99121604 has 12 divisors (see below), whose sum is σ = 174528144. Its totient is φ = 49256424.

The previous prime is 99121567. The next prime is 99121619. The reversal of 99121604 is 40612199.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75362 + ... + 76665.

It is an arithmetic number, because the mean of its divisors is an integer number (14544012).

Almost surely, 2^99121604 is an apocalyptic number.

It is an amenable number.

99121604 is a deficient number, since it is larger than the sum of its proper divisors (75406540).

99121604 is a wasteful number, since it uses less digits than its factorization.

99121604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152194 (or 152192 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 99121604 is about 9955.9833266232. The cubic root of 99121604 is about 462.7958335230.

The spelling of 99121604 in words is "ninety-nine million, one hundred twenty-one thousand, six hundred four".