7,909

[Math.]  The 17th Keith number: 7, 9, 0, 9, 25, 43, 77, 154, 299, 573, 1103, 2129, 4104, 7909, 15245…

 

7,919

[Math.]  The 1000th prime number.

 

7,920

[Math.]  Sum (in degrees) of all internal angles of a 46-side polygon.

 

[Math.]  The smallest sporadic group is the Mathieu group M11, which has order 7920 and the largest is the monster group, which has order 808017424794512875886459904961710757005754368000000000.

 

[Measure]  The number of inches in a furlong.

U.S. customary units for linear measures: 1 mile = 8 furlongs = 320 rods = 1,760 yards = 5,280 feet = 63,360 inches.

 

7,922

[Library]  ISBN-0-7922 is the International Standard Book Number for books published by National Geographic Society.

 

7,923

[Library]  ISBN-0-7923 is the International Standard Book Number for books published by Kluwer Academic Publishers.

 

[Math.]  The ratio 15846/7923 = 2, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #2.

 

7,932

[Math.]  The ratio 15864/7932 = 2, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #2.

 

7,937

[Math.]  Circular prime numbers: all 4 numbers 3779, 7793, 7937 and 9377 are prime.

 

7,941

[Math.]  7941 = 7777+9+44+111.

 

[Math.]  The ratio 63528/7941 = 8, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #8.

 

7,942

[Math.]  7942 = 7777+99+44+22.

 

7,946

[Math.]  7946 = 7777+99+4+66.

 

7,956

[Math.]  Each ratio 15768/3942 = 17568/4392 = 23184/5796 = 31824/7956 = 4, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #4.

 

7,958

[Theology]  There are 31103 verses in the Holy Bible: 23145 verses in Old Testament and 7958 in New Testament (plus 137 un-numbered verses in Psalms).