91313025 has 24 divisors (see below), whose sum is σ = 156180480. Its totient is φ = 47019840.

The previous prime is 91313009. The next prime is 91313071. The reversal of 91313025 is 52031319.

It is a happy number.

It is not a de Polignac number, because 91313025 - 2⁴ = 91313009 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 91312986 and 91313004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18817 + ... + 23166.

It is an arithmetic number, because the mean of its divisors is an integer number (6507520).

Almost surely, 2^91313025 is an apocalyptic number.

It is an amenable number.

91313025 is a deficient number, since it is larger than the sum of its proper divisors (64867455).

91313025 is a wasteful number, since it uses less digits than its factorization.

91313025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42025 (or 42020 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 91313025 is about 9555.7848971186. The cubic root of 91313025 is about 450.3092935408.

The spelling of 91313025 in words is "ninety-one million, three hundred thirteen thousand, twenty-five".