91772025 has 24 divisors (see below), whose sum is σ = 155835264. Its totient is φ = 47620800.

The previous prime is 91772017. The next prime is 91772027. The reversal of 91772025 is 52027719.

It is not a de Polignac number, because 91772025 - 2³ = 91772017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (91772027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13761 + ... + 19310.

It is an arithmetic number, because the mean of its divisors is an integer number (6493136).

Almost surely, 2^91772025 is an apocalyptic number.

It is an amenable number.

91772025 is a deficient number, since it is larger than the sum of its proper divisors (64063239).

91772025 is a wasteful number, since it uses less digits than its factorization.

91772025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33121 (or 33116 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 91772025 is about 9579.7716569864. The cubic root of 91772025 is about 451.0625508331.

The spelling of 91772025 in words is "ninety-one million, seven hundred seventy-two thousand, twenty-five".