91372025 has 12 divisors (see below), whose sum is σ = 119966652. Its totient is φ = 68797440.

The previous prime is 91372019. The next prime is 91372027. The reversal of 91372025 is 52027319.

It can be written as a sum of positive squares in 6 ways, for example, as 10137856 + 81234169 = 3184^2 + 9013^2 .

It is not a de Polignac number, because 91372025 - 2⁴ = 91372009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91372027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107072 + ... + 107921.

It is an arithmetic number, because the mean of its divisors is an integer number (9997221).

Almost surely, 2^91372025 is an apocalyptic number.

It is an amenable number.

91372025 is a deficient number, since it is larger than the sum of its proper divisors (28594627).

91372025 is a wasteful number, since it uses less digits than its factorization.

91372025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215020 (or 215015 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 91372025 is about 9558.8715338161. The cubic root of 91372025 is about 450.4062586350.

The spelling of 91372025 in words is "ninety-one million, three hundred seventy-two thousand, twenty-five".