91590916 has 12 divisors (see below), whose sum is σ = 160500060. Its totient is φ = 45733760.

The previous prime is 91590913. The next prime is 91590953. The reversal of 91590916 is 61909519.

It can be written as a sum of positive squares in 2 ways, for example, as 14853316 + 76737600 = 3854^2 + 8760^2 .

It is not an unprimeable number, because it can be changed into a prime (91590913) 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 3 ways as a sum of consecutive naturals, for example, 12001 + ... + 18088.

It is an arithmetic number, because the mean of its divisors is an integer number (13375005).

Almost surely, 2^91590916 is an apocalyptic number.

It is an amenable number.

91590916 is a deficient number, since it is larger than the sum of its proper divisors (68909144).

91590916 is a wasteful number, since it uses less digits than its factorization.

91590916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30854 (or 30852 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 40.

The square root of 91590916 is about 9570.3143104080. The cubic root of 91590916 is about 450.7656365139.

The spelling of 91590916 in words is "ninety-one million, five hundred ninety thousand, nine hundred sixteen".