Seventy-nine (79, LXXIX) is the natural number following seventy-eight and preceding eighty. It is the 22nd prime number. The next is eighty-three. Seventy-nine is a permutable prime, with ninety-seven.
Seventy-nine is also:
- The atomic number of gold.
- The designation of Interstate 79, a freeway that runs from West Virginia to Pennsylvania.
- The number of original Star Trek episodes, not counting the first pilot, "The Cage", which was enclosed into "The Menagerie".