99992172 has 48 divisors (see below), whose sum is σ = 267321600. Its totient is φ = 28496832.

The previous prime is 99992161. The next prime is 99992173. The reversal of 99992172 is 27129999.

It is a super-2 number, since 2×99992172² = 19996868922555168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99992173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37954 + ... + 40502.

It is an arithmetic number, because the mean of its divisors is an integer number (5569200).

Almost surely, 2^99992172 is an apocalyptic number.

It is an amenable number.

99992172 is an abundant number, since it is smaller than the sum of its proper divisors (167329428).

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

99992172 is a wasteful number, since it uses less digits than its factorization.

99992172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030 (or 3028 counting only the distinct ones).

The product of its digits is 183708, while the sum is 48.

The square root of 99992172 is about 9999.6085923400. The cubic root of 99992172 is about 464.1467715928.

The spelling of 99992172 in words is "ninety-nine million, nine hundred ninety-two thousand, one hundred seventy-two".