91912012 has 6 divisors (see below), whose sum is σ = 160846028. Its totient is φ = 45956004.

The previous prime is 91911977. The next prime is 91912031. The reversal of 91912012 is 21021919.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11488998 + ... + 11489005.

Almost surely, 2^91912012 is an apocalyptic number.

It is an amenable number.

91912012 is a deficient number, since it is larger than the sum of its proper divisors (68934016).

91912012 is a wasteful number, since it uses less digits than its factorization.

91912012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22978007 (or 22978005 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 91912012 is about 9587.0752578667. The cubic root of 91912012 is about 451.2917812363.

The spelling of 91912012 in words is "ninety-one million, nine hundred twelve thousand, twelve".