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Number 97

A page of the Numeropedia - the Special Encyclopedia of Numbers

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[Calendar]  The number of leap years in a period of 400 years, following the adoption of the current Gregorian calendar, created by Pope Gregory XIII in 1582 to reform the old Julian calendar.

 

[Chemistry]  The atomic number of Berkelium (Bk). An element in the Actinide series: Actinium (89) to Lawrencium (103).

 

[Math.]  The largest 2-digit prime number.  An absolute prime number (or permutable prime number): both numbers 97 and 79 are prime numbers or in fact, absolute prime numbers.

 

[Math.]  A 6-term arithmetic progression of prime numbers, of common difference 30: 7, 37, 67, 97, 127 and 157.

 

[Math.]  (Sequence of numbers (10n–3), n > 1).

973 = 912,673 = (91+2–6+7+3)3.

 

[Math.]  9710 = 73,742,412,689,492,826,049 =

= (7+3+7+4+2+4+1+2+6+8+9+4+9+2+8+2+6+0+4+9)10.

 

[Math.]  97,779,977 = 97×1,008,041.

 

97.5

[Money]  U.S. penny is currently made of 97.5% zinc and 2.5% copper, (since 1982).