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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:

This article is about the number. For the year AD 99, see 99.