97917880 has 32 divisors (see below), whose sum is σ = 225442800. Its totient is φ = 38255616.

The previous prime is 97917851. The next prime is 97917899. The reversal of 97917880 is 8871979.

It is a super-2 number, since 2×97917880² = 19175822447388800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26745 + ... + 30184.

Almost surely, 2^97917880 is an apocalyptic number.

It is an amenable number.

97917880 is an abundant number, since it is smaller than the sum of its proper divisors (127524920).

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

97917880 is a wasteful number, since it uses less digits than its factorization.

97917880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56983 (or 56979 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 97917880 is about 9895.3463810015. The cubic root of 97917880 is about 460.9148146376.

It can be divided in two parts, 9791 and 7880, that added together give a palindrome (17671).

The spelling of 97917880 in words is "ninety-seven million, nine hundred seventeen thousand, eight hundred eighty".