99999912 has 32 divisors (see below), whose sum is σ = 253735200. Its totient is φ = 32835264.

The previous prime is 99999847. The next prime is 99999931. The reversal of 99999912 is 21999999.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29487 + ... + 32702.

It is an arithmetic number, because the mean of its divisors is an integer number (7929225).

Almost surely, 2^99999912 is an apocalyptic number.

It is an amenable number.

99999912 is an abundant number, since it is smaller than the sum of its proper divisors (153735288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99999912 is a wasteful number, since it uses less digits than its factorization.

99999912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62265 (or 62261 counting only the distinct ones).

The product of its digits is 1062882, while the sum is 57.

The square root of 99999912 is about 9999.9955999990. The cubic root of 99999912 is about 464.1587472080.

The spelling of 99999912 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred twelve".