91690312 has 32 divisors (see below), whose sum is σ = 202821120. Its totient is φ = 38027520.

The previous prime is 91690289. The next prime is 91690321. The reversal of 91690312 is 21309619.

It is a super-3 number, since 3×91690312³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 24673 + ... + 28144.

It is an arithmetic number, because the mean of its divisors is an integer number (6338160).

Almost surely, 2^91690312 is an apocalyptic number.

It is an amenable number.

91690312 is an abundant number, since it is smaller than the sum of its proper divisors (111130808).

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

91690312 is a wasteful number, since it uses less digits than its factorization.

91690312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52861 (or 52857 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 91690312 is about 9575.5058352027. The cubic root of 91690312 is about 450.9286370437.

The spelling of 91690312 in words is "ninety-one million, six hundred ninety thousand, three hundred twelve".