91250012 has 12 divisors (see below), whose sum is σ = 182500080. Its totient is φ = 39107136.

The previous prime is 91250011. The next prime is 91250017. The reversal of 91250012 is 21005219.

91250012 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91250011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1629437 + ... + 1629492.

It is an arithmetic number, because the mean of its divisors is an integer number (15208340).

Almost surely, 2^91250012 is an apocalyptic number.

It is an amenable number.

91250012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

91250012 is a wasteful number, since it uses less digits than its factorization.

91250012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258940 (or 3258938 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 91250012 is about 9552.4872153801. The cubic root of 91250012 is about 450.2056870397.

The spelling of 91250012 in words is "ninety-one million, two hundred fifty thousand, twelve".