Ninety-nine (99, XCIX) is the natural number following ninety-eight and preceding one hundred. It is a composite number, with its divisors being 3, 9, 11 and 33, and its factorization is
The ninth repdigit, ninety-nine is a palindromic number.
99 is also:
- Often used as a qualifier for something which is almost but not quite certain: "Ninety-nine per cent sure."
- The atomic number of einsteinium, an actinide.
- The designation of American Interstate 99, a freeway in Pennsylvania, planned to be extended into New York.
- A card game.
- In the TV show Get Smart, the codename of Agent 99.
- In the title of the Nena song 99 Luftballoons (99 Red Balloons).
- The uniform number of retired NHL player Wayne Gretzky.
