99715172 has 12 divisors (see below), whose sum is σ = 175477680. Its totient is φ = 49578696.

The previous prime is 99715163. The next prime is 99715181. The reversal of 99715172 is 27151799.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99715163) and next prime (99715181).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68918 + ... + 70349.

It is an arithmetic number, because the mean of its divisors is an integer number (14623140).

Almost surely, 2^99715172 is an apocalyptic number.

It is an amenable number.

99715172 is a deficient number, since it is larger than the sum of its proper divisors (75762508).

99715172 is a wasteful number, since it uses less digits than its factorization.

99715172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139450 (or 139448 counting only the distinct ones).

The product of its digits is 39690, while the sum is 41.

The square root of 99715172 is about 9985.7484446585. The cubic root of 99715172 is about 463.7177794786.

The spelling of 99715172 in words is "ninety-nine million, seven hundred fifteen thousand, one hundred seventy-two".