99913599 has 12 divisors (see below), whose sum is σ = 144440400. Its totient is φ = 66553344.

The previous prime is 99913559. The next prime is 99913601. The reversal of 99913599 is 99531999.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-99913599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99913519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8742 + ... + 16620.

It is an arithmetic number, because the mean of its divisors is an integer number (12036700).

Almost surely, 2^99913599 is an apocalyptic number.

99913599 is a deficient number, since it is larger than the sum of its proper divisors (44526801).

99913599 is a wasteful number, since it uses less digits than its factorization.

99913599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9294 (or 9291 counting only the distinct ones).

The product of its digits is 885735, while the sum is 54.

The square root of 99913599 is about 9995.6790164551. The cubic root of 99913599 is about 464.0251655371.

The spelling of 99913599 in words is "ninety-nine million, nine hundred thirteen thousand, five hundred ninety-nine".