91684812 has 24 divisors (see below), whose sum is σ = 214235056. Its totient is φ = 30518208.

The previous prime is 91684807. The next prime is 91684829. The reversal of 91684812 is 21848619.

It is a super-2 number, since 2×91684812² = 16812209502950688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4038 + ... + 14130.

Almost surely, 2^91684812 is an apocalyptic number.

It is an amenable number.

91684812 is an abundant number, since it is smaller than the sum of its proper divisors (122550244).

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

91684812 is a wasteful number, since it uses less digits than its factorization.

91684812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10857 (or 10855 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 91684812 is about 9575.2186398014. The cubic root of 91684812 is about 450.9196206164.

The spelling of 91684812 in words is "ninety-one million, six hundred eighty-four thousand, eight hundred twelve".