97991376 has 120 divisors (see below), whose sum is σ = 299739744. Its totient is φ = 27498240.

The previous prime is 97991359. The next prime is 97991407. The reversal of 97991376 is 67319979.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143131 + ... + 143813.

Almost surely, 2^97991376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97991376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149869872).

97991376 is an abundant number, since it is smaller than the sum of its proper divisors (201748368).

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

97991376 is a wasteful number, since it uses less digits than its factorization.

97991376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769 (or 756 counting only the distinct ones).

The product of its digits is 642978, while the sum is 51.

The square root of 97991376 is about 9899.0593492513. The cubic root of 97991376 is about 461.0301048627.

It can be divided in two parts, 9799 and 1376, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 97991376 in words is "ninety-seven million, nine hundred ninety-one thousand, three hundred seventy-six".