91986064 has 20 divisors (see below), whose sum is σ = 178520940. Its totient is φ = 45916160.

The previous prime is 91986019. The next prime is 91986071. The reversal of 91986064 is 46068919.

It can be written as a sum of positive squares in 2 ways, for example, as 67897600 + 24088464 = 8240^2 + 4908^2 .

It is a super-2 number, since 2×91986064² = 16922871940424192, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91986064.

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, 5772 + ... + 14740.

It is an arithmetic number, because the mean of its divisors is an integer number (8926047).

Almost surely, 2^91986064 is an apocalyptic number.

It is an amenable number.

91986064 is a deficient number, since it is larger than the sum of its proper divisors (86534876).

91986064 is a wasteful number, since it uses less digits than its factorization.

91986064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9618 (or 9612 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 91986064 is about 9590.9365548939. The cubic root of 91986064 is about 451.4129481626.

The spelling of 91986064 in words is "ninety-one million, nine hundred eighty-six thousand, sixty-four".