99975788 has 12 divisors (see below), whose sum is σ = 190862952. Its totient is φ = 45443520.

The previous prime is 99975787. The next prime is 99975791. The reversal of 99975788 is 88757999.

It is a self number, because there is not a number n which added to its sum of digits gives 99975788.

It is not an unprimeable number, because it can be changed into a prime (99975787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136045 + ... + 1136132.

It is an arithmetic number, because the mean of its divisors is an integer number (15905246).

Almost surely, 2^99975788 is an apocalyptic number.

It is an amenable number.

99975788 is a deficient number, since it is larger than the sum of its proper divisors (90887164).

99975788 is a wasteful number, since it uses less digits than its factorization.

99975788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272192 (or 2272190 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 62.

The square root of 99975788 is about 9998.7893267135. The cubic root of 99975788 is about 464.1214196213.

The spelling of 99975788 in words is "ninety-nine million, nine hundred seventy-five thousand, seven hundred eighty-eight".