91313968 has 20 divisors (see below), whose sum is σ = 177080680. Its totient is φ = 45615744.

The previous prime is 91313947. The next prime is 91313977. The reversal of 91313968 is 86931319.

It is a self number, because there is not a number n which added to its sum of digits gives 91313968.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23971 + ... + 27517.

It is an arithmetic number, because the mean of its divisors is an integer number (8854034).

Almost surely, 2^91313968 is an apocalyptic number.

It is an amenable number.

91313968 is a deficient number, since it is larger than the sum of its proper divisors (85766712).

91313968 is a wasteful number, since it uses less digits than its factorization.

91313968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5164 (or 5158 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The square root of 91313968 is about 9555.8342388302. The cubic root of 91313968 is about 450.3108436673.

The spelling of 91313968 in words is "ninety-one million, three hundred thirteen thousand, nine hundred sixty-eight".