91539474 has 16 divisors (see below), whose sum is σ = 197162112. Its totient is φ = 28165968.

The previous prime is 91539451. The next prime is 91539479. The reversal of 91539474 is 47493519.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91539479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 586714 + ... + 586869.

It is an arithmetic number, because the mean of its divisors is an integer number (12322632).

Almost surely, 2^91539474 is an apocalyptic number.

91539474 is an abundant number, since it is smaller than the sum of its proper divisors (105622638).

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

91539474 is a wasteful number, since it uses less digits than its factorization.

91539474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173601.

The product of its digits is 136080, while the sum is 42.

The square root of 91539474 is about 9567.6263513998. The cubic root of 91539474 is about 450.6812299320.

The spelling of 91539474 in words is "ninety-one million, five hundred thirty-nine thousand, four hundred seventy-four".