Ninety-nine is a natural number that follows ninety-eight and precedes one hundred. It is represented numerically as 99 and is often used in counting and mathematics. In Roman numerals, ninety-nine is written as XCIX. In various contexts, ninety-nine can symbolize abundance or near completion, as it is just one short of a hundred. It is also commonly associated with the phrase "ninety-nine problems," which is popularized in music and culture, particularly by the artist Jay-Z.