99539972 has 24 divisors (see below), whose sum is σ = 203145600. Its totient is φ = 42659400.

The previous prime is 99539959. The next prime is 99540017. The reversal of 99539972 is 27993599.

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, 34904 + ... + 37647.

It is an arithmetic number, because the mean of its divisors is an integer number (8464400).

Almost surely, 2^99539972 is an apocalyptic number.

It is an amenable number.

99539972 is an abundant number, since it is smaller than the sum of its proper divisors (103605628).

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

99539972 is a wasteful number, since it uses less digits than its factorization.

99539972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72576 (or 72560 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 53.

The square root of 99539972 is about 9976.9720857583. The cubic root of 99539972 is about 463.4460355321.

The spelling of 99539972 in words is "ninety-nine million, five hundred thirty-nine thousand, nine hundred seventy-two".