79 (number)
From Wikipedia, the free encyclopedia
79 (seventy-nine) is the natural number following 78 and preceding 80.
| Cardinal | 79 seventy-nine |
| Ordinal | 79th seventy-ninth |
| Factorization | prime |
| Divisors | 1, 79 |
| Roman numeral | LXXIX |
| Binary | 1001111 |
| Hexadecimal | 4F |
[edit] In mathematics
Seventy-nine is the 22nd prime number. The next is eighty-three. Seventy-nine is a permutable prime, with ninety-seven. 79 is a Kynea number.
Since 23! + 1 is divisible by 79 but 79 is not one more than a multiple of 23, 79 is a Pillai prime. 79 is the smallest number that can't be represented as a sum of fewer than 19 fourth powers.
79 is a strictly non-palindromic number.
[edit] In science
- The atomic number of gold.
In astronomy,
- Messier object M79, a magnitude 8.5 globular cluster in the constellation Lepus
- The New General Catalogue object NGC 79, a galaxy in the constellation Andromeda
- The Saros number of the solar eclipse series which began on -434 May 21 and ended on 828 June 16. The duration of Saros series 79 was 1262.1 years, and it contained 71 solar eclipses.
- The Saros number of the lunar eclipse series which began on -150 February 16 and ended on 1166 April 12. The duration of Saros series 79 was 1316.2 years, and it contained 74 lunar eclipses.
[edit] In other fields
Seventy-nine is also:
- Live Seventy-Nine
- The designation of Interstate 79, a freeway that runs from West Virginia to Pennsylvania.
- The number of Star Trek: The Original Series episodes, not counting the first pilot, "The Cage", which was enclosed into "The Menagerie".
- The number of recommendations in the Iraq Study Group Report.
- The year AD 79, 79 BC, or 1979.
