91686012 has 24 divisors (see below), whose sum is σ = 233382912. Its totient is φ = 27783600.

The previous prime is 91685977. The next prime is 91686031. The reversal of 91686012 is 21068619.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 347164 + ... + 347427.

It is an arithmetic number, because the mean of its divisors is an integer number (9724288).

Almost surely, 2^91686012 is an apocalyptic number.

It is an amenable number.

91686012 is an abundant number, since it is smaller than the sum of its proper divisors (141696900).

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

91686012 is a wasteful number, since it uses less digits than its factorization.

91686012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694609 (or 694607 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 91686012 is about 9575.2813013509. The cubic root of 91686012 is about 450.9215878677.

The spelling of 91686012 in words is "ninety-one million, six hundred eighty-six thousand, twelve".