99791172 has 36 divisors (see below), whose sum is σ = 271655020. Its totient is φ = 30704832.

The previous prime is 99791129. The next prime is 99791191. The reversal of 99791172 is 27119799.

It can be written as a sum of positive squares in 2 ways, for example, as 4260096 + 95531076 = 2064^2 + 9774^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106147 + ... + 107082.

Almost surely, 2^99791172 is an apocalyptic number.

It is an amenable number.

99791172 is an abundant number, since it is smaller than the sum of its proper divisors (171863848).

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

99791172 is a wasteful number, since it uses less digits than its factorization.

99791172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213252 (or 213247 counting only the distinct ones).

The product of its digits is 71442, while the sum is 45.

The square root of 99791172 is about 9989.5531431591. The cubic root of 99791172 is about 463.8355602894.

The spelling of 99791172 in words is "ninety-nine million, seven hundred ninety-one thousand, one hundred seventy-two".