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99 (number)

Encyclopedia : 9 : 99 : 99N : 99 (number)


Cardinal 99
ninety-nine
Ordinal 99th
ninety-ninth
Factorization[3^2 \cdot 11]
Divisors 3, 9, 11, 33
Roman numeralXCIX
Binary1100011
Hexadecimal63
Hebrewצ (Tsadi)

99 (ninety-nine) is the natural number following 98 and preceding 100.

In mathematics

Ninety-nine is the ninth repdigit, a palindromic number and a Kaprekar number.

It is the sum of the sums of divisors of the first eleven integers.

In astronomy

Messier object M99, a magnitude 10.5 spiral galaxy in the constellation Coma Berenices.

The New General Catalogue object NGC 99, a magnitude 13.7 spiral galaxy in the constellation Pisces.

In other fields

Ninety-nine is also:

 


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