91957474 has 16 divisors (see below), whose sum is σ = 160996608. Its totient is φ = 38571552.

The previous prime is 91957451. The next prime is 91957483. The reversal of 91957474 is 47475919.

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, 69219 + ... + 70534.

It is an arithmetic number, because the mean of its divisors is an integer number (10062288).

Almost surely, 2^91957474 is an apocalyptic number.

91957474 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

91957474 is a deficient number, since it is larger than the sum of its proper divisors (69039134).

91957474 is a wasteful number, since it uses less digits than its factorization.

91957474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139809.

The product of its digits is 317520, while the sum is 46.

The square root of 91957474 is about 9589.4459693978. The cubic root of 91957474 is about 451.3661757388.

The spelling of 91957474 in words is "ninety-one million, nine hundred fifty-seven thousand, four hundred seventy-four".