91684986 has 16 divisors (see below), whose sum is σ = 184241568. Its totient is φ = 30416400.

The previous prime is 91684973. The next prime is 91685003. The reversal of 91684986 is 68948619.

It is a happy number.

It is a super-2 number, since 2×91684986² = 16812273315640392, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 34945 + ... + 37476.

It is an arithmetic number, because the mean of its divisors is an integer number (11515098).

Almost surely, 2^91684986 is an apocalyptic number.

91684986 is an abundant number, since it is smaller than the sum of its proper divisors (92556582).

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

91684986 is a wasteful number, since it uses less digits than its factorization.

91684986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72637.

The product of its digits is 746496, while the sum is 51.

The square root of 91684986 is about 9575.2277257515. The cubic root of 91684986 is about 450.9199058689.

The spelling of 91684986 in words is "ninety-one million, six hundred eighty-four thousand, nine hundred eighty-six".