97172790 has 64 divisors (see below), whose sum is σ = 273998592. Its totient is φ = 21744000.

The previous prime is 97172759. The next prime is 97172837. The reversal of 97172790 is 9727179.

It is a super-2 number, since 2×97172790² = 18885102232768200, 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 31 ways as a sum of consecutive naturals, for example, 7036 + ... + 15615.

It is an arithmetic number, because the mean of its divisors is an integer number (4281228).

Almost surely, 2^97172790 is an apocalyptic number.

97172790 is an abundant number, since it is smaller than the sum of its proper divisors (176825802).

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

97172790 is a wasteful number, since it uses less digits than its factorization.

97172790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22685.

The product of its (nonzero) digits is 55566, while the sum is 42.

The square root of 97172790 is about 9857.6259819492. The cubic root of 97172790 is about 459.7427515644.

The spelling of 97172790 in words is "ninety-seven million, one hundred seventy-two thousand, seven hundred ninety".