99639513 has 6 divisors (see below), whose sum is σ = 143923754. Its totient is φ = 66426336.

The previous prime is 99639497. The next prime is 99639539. The reversal of 99639513 is 31593699.

99639513 is a `hidden beast` number, since 9 + 9 + 639 + 5 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 85599504 + 14040009 = 9252^2 + 3747^2 .

It is not a de Polignac number, because 99639513 - 2⁴ = 99639497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99639583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5535520 + ... + 5535537.

Almost surely, 2^99639513 is an apocalyptic number.

It is an amenable number.

99639513 is a deficient number, since it is larger than the sum of its proper divisors (44284241).

99639513 is a wasteful number, since it uses less digits than its factorization.

99639513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11071063 (or 11071060 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 99639513 is about 9981.9593767957. The cubic root of 99639513 is about 463.6004676728.

The spelling of 99639513 in words is "ninety-nine million, six hundred thirty-nine thousand, five hundred thirteen".