91940574 has 16 divisors (see below), whose sum is σ = 200597760. Its totient is φ = 27860760.

The previous prime is 91940567. The next prime is 91940593. The reversal of 91940574 is 47504919.

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, 696454 + ... + 696585.

It is an arithmetic number, because the mean of its divisors is an integer number (12537360).

Almost surely, 2^91940574 is an apocalyptic number.

91940574 is an abundant number, since it is smaller than the sum of its proper divisors (108657186).

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

91940574 is a wasteful number, since it uses less digits than its factorization.

91940574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393055.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 91940574 is about 9588.5647518281. The cubic root of 91940574 is about 451.3385232621.

The spelling of 91940574 in words is "ninety-one million, nine hundred forty thousand, five hundred seventy-four".