99131900 has 54 divisors (see below), whose sum is σ = 250249608. Its totient is φ = 33986400.

The previous prime is 99131897. The next prime is 99131933. The reversal of 99131900 is 913199.

It is a super-2 number, since 2×99131900² = 19654267195220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5216 + ... + 15015.

It is an arithmetic number, because the mean of its divisors is an integer number (4634252).

Almost surely, 2^99131900 is an apocalyptic number.

It is an amenable number.

99131900 is an abundant number, since it is smaller than the sum of its proper divisors (151117708).

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

99131900 is a wasteful number, since it uses less digits than its factorization.

99131900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20259 (or 20245 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 99131900 is about 9956.5003891930. The cubic root of 99131900 is about 462.8118568746.

The spelling of 99131900 in words is "ninety-nine million, one hundred thirty-one thousand, nine hundred".