91201872 has 40 divisors (see below), whose sum is σ = 249466176. Its totient is φ = 28612096.

The previous prime is 91201867. The next prime is 91201879. The reversal of 91201872 is 27810219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91201879) by changing a digit.

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, 55068 + ... + 56699.

Almost surely, 2^91201872 is an apocalyptic number.

It is an amenable number.

91201872 is an abundant number, since it is smaller than the sum of its proper divisors (158264304).

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

91201872 is a wasteful number, since it uses less digits than its factorization.

91201872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111795 (or 111789 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 91201872 is about 9549.9671203622. The cubic root of 91201872 is about 450.1265027062.

The spelling of 91201872 in words is "ninety-one million, two hundred one thousand, eight hundred seventy-two".