91901372 has 12 divisors (see below), whose sum is σ = 161046816. Its totient is φ = 45888000.

The previous prime is 91901357. The next prime is 91901393. The reversal of 91901372 is 27310919.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12293 + ... + 18300.

It is an arithmetic number, because the mean of its divisors is an integer number (13420568).

Almost surely, 2^91901372 is an apocalyptic number.

It is an amenable number.

91901372 is a deficient number, since it is larger than the sum of its proper divisors (69145444).

91901372 is a wasteful number, since it uses less digits than its factorization.

91901372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31348 (or 31346 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 91901372 is about 9586.5203280440. The cubic root of 91901372 is about 451.2743662843.

The spelling of 91901372 in words is "ninety-one million, nine hundred one thousand, three hundred seventy-two".