Numbers 1900-1999

 A page of the Numeropedia - the Special Encyclopedia of Numbers

1000-1099   1100-1199   1200-1299   1300-1399   1400-1499

 1500-1599   1600-1699   1700-1799   1800-1899   1900-1999

All Numbers  &  [1K…) * [2K…) * [3K…) * [4K…) * [5K…) * [6K…) * [7K…) * [8K…) * [9K…)  & [10K] & [100K]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q - ...

1,900

[Calendar]  This year is a non-leap year, following the adoption of the current Gregorian calendar, created by Pope Gregory XIII in 1582 to reform the old Julian calendar. 

 

[Calendar]  The last year of the 19th century.

 

[Movie]  Name of TV show/series or movie: “1900”.

 

[Phone]  The first 4 digits to be dialed for any 900/toll-call (cost-per-call) telephone number dialing within the U.S. and Canada.

 

1,901

[Calendar]  The first year in the 20th century.  

The first year that is a prime number in the 20th century.

 

[History]  The year of the first Nobel prizes, always presented on 10 December, the anniversary of Alfred Nobel’s death in 1896, who was a Swedish industrialist, invented dynamite 1866. The prizes are in: Chemistry, Literature, Medicine, Physics, Peace. The Peace prize is the only one presented in Oslo, Norway and the others are in Stockholm, Sweden. The prize in Economy was established separately later in 1968 by the Swedish National Bank and first awarded in 1969.

 

1,907

[Math.]  A prime number.

 

1,913

[Math.]  A prime number.

 

1,924

[Math.]  A primitive Pythagorean triangle of sides (693, 1924, 2045) has area 666,666.

 

[Sport]  The year of the first winter Olympic Games (Chamomix, France).

 

1,930

[Geology]  The St. Helena Islands in Atlantic ocean is the most isolated islands in the world, approximately 1930 km (1200 miles) from the nearest continent.

 

1,931

[Math.]  Circular prime numbers: all 4 numbers 1193, 1931, 9311 and 3119 are prime.

 

1,933

[Math.]  A prime number.

 

1,936

[Math.]  1936 = (–1+9+36)2 = 442.

 

1,937

[Math.]  19372 = 3,751,969 = (–37+5+1969)2.

 

1,941

[Movie]  Name of TV show/series or movie: “1941”.

 

1,943

[Movie]  Name of TV show/series or movie: “Tehran 1943” (also, “Tehran 43”).

 

1,944

[Math.]  1944 = 12×23×35.

 

1,946

[History]  The U.S. “Baby Boomers” generation was born between 1946 and 1964. Early Baby Boomers: 1946-1955, Late Boomers: 1956-1964.

The U.S. “Generation X” was born between 1965 and 1976.

The U.S. “Millennials” generation (or Generation Y) was born between 1977 and 1990.

 

 [Math.]  Professor Umbugio’s famous “The End of the World” formula: the number 1492n–1770n–1863n+2141n is divisible by 1946, for all values of n up to 1945, where 1492, 1770, 1863 are the year of the Discovery of the New World by Christopher Columbus, the Boston Massacre and the Gettysburg Address, respectively. (E. Starke, Professor Umbugio’s prediction, American Mathematical Monthly, 54, January 1947.)

 

1,949

[Math.]  A prime number.

 

1,950

[Math.]  Two consecutive sums of consecutive numbers:

144+145+…+156 = 157+158+…+168 = 1950.

 

1,953

[Math.]  A triangular number (sum of all integers from 1 to 62): 1953 = 1+2+…+61+62.

 

1955--1956

[History]  The U.S. “Baby Boomers” generation was born between 1946 and 1964. Early Baby Boomers: 1946-1955, Late Boomers: 1956-1964.

The U.S. “Generation X” was born between 1965 and 1976.

The U.S. “Millennials” generation (or Generation Y) was born between 1977 and 1990.

 

1,962

[Math.]  Two multiples of number 1962, 1962×2 = 3924 and 1962×9 = 17,658, use each of 9 digits 1-9 once.

 

1,963

[Math.]  7852 = 4×1963, using each of 9 digits 1-9 once.

 

1964--1965

[History]  The U.S. “Baby Boomers” generation was born between 1946 and 1964. Early Baby Boomers: 1946-1955, Late Boomers: 1956-1964.

The U.S. “Generation X” was born between 1965 and 1976.

The U.S. “Millennials” generation (or Generation Y) was born between 1977 and 1990.

 

1,968

[History]  The year of “Tet Offensive” of the Vietnam War.

 

1,973

[Math.]  A prime number.

 

1,975

[History]  The fall of Saigon, officially end of Vietnam war on April 30, 1975.

 

 [Movie]  Name of TV show/series or movie: “Airport 1975”.

 

1,976

[Phone]  The first 4 digits to be dialed for any 976/toll-call (cost-per-call) telephone number dialing within the U.S. and Canada.

 

1976--1977

[History]  The U.S. “Baby Boomers” generation was born between 1946 and 1964. Early Baby Boomers: 1946-1955, Late Boomers: 1956-1964.

The U.S. “Generation X” was born between 1965 and 1976.

The U.S. “Millennials” generation (or Generation Y) was born between 1977 and 1990.

 

1,979

[Math.]  A prime number.

 

1,980

[Math.]  Sum (in degrees) of all internal angles of a 13-side polygon.

 

1980--2009 & 2010--2039

[Tech.]  The 10th digit of a 17-character VIN (Vehicle Identification Number) indicates the model year of an automobile (after 1980). The 7th character decides the year range [1980-2009] or [2010-2039].

A = 1980 or 2010…

L = 1990 or 2020…

Y = 2000 or 2030…

B = 1981 or 2011…

M = 1991 or 2021…

1 = 2001 or 2031…

C = 1982 or 2012…

N = 1992 or 2022…

2 = 2002 or 2032…

D = 1983 or 2013…

P = 1993 or 2023…

3 = 2003 or 2033…

E = 1984 or 2014…

R = 1994 or 2024…

4 = 2004 or 2034…

F = 1985 or 2015…

S = 1995 or 2025…

5 = 2005 or 2035…

G = 1986 or 2016…

T= 1996 or 2026…

6 = 2006 or 2036…

H = 1987 or 2017…

V = 1997 or 2027…

7 = 2007 or 2037…

J = 1988 or 2018…

W = 1998 or 2028…

8 = 2008 or 2038…

K = 1989 or 2019…

X = 1999 or 2029…

9 = 2009 or 2039…

 

1,984

[Movie]  Name of TV show/series or movie: “1984”.

 

1,985

[Zip]  U.S. Postal Zip Code: West Newbury, Massachusetts 01985.

The last year of the 20th century to be a U.S. Zip Code.

 

1,987

[Math.]  The 300th prime number.

 

1990

[History]  The U.S. “Baby Boomers” generation was born between 1946 and 1964. Early Baby Boomers: 1946-1955, Late Boomers: 1956-1964.

The U.S. “Generation X” was born between 1965 and 1976.

The U.S. “Millennials” generation (or Generation Y) was born between 1977 and 1990.

 

1,992

[Math.]  j(2991) = 1992, where j is the Euler’s totient function.

 

1,993

[Math.]  A prime number.

 

1,997

[Math.]  A prime number.

 

1,998

[Math.]  5553 = 170,953,875 and 170+953+875 = 2×999

9993 = 997,002,999 and 997+002+999 = 2×999.

333,3333 = 37,036,925,926,037,037 and 37+036+925+926+037+037 = 2×999.

666,6663 = 296,295,407,408,296,296 and 296+295+407+408+296+296 = 2×999

777,7773 = 470,506,133,060,396,433 and 470+506+133+060+396+433 = 2×999 = 1998.

 

1,999

[Calendar & Math.]  The last year that is a prime number in the 20th century.