91297325 has 24 divisors (see below), whose sum is σ = 133562880. Its totient is φ = 60580800.

The previous prime is 91297321. The next prime is 91297343. The reversal of 91297325 is 52379219.

It is not a de Polignac number, because 91297325 - 2² = 91297321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91297321) 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 23 ways as a sum of consecutive naturals, for example, 2990 + ... + 13839.

It is an arithmetic number, because the mean of its divisors is an integer number (5565120).

Almost surely, 2^91297325 is an apocalyptic number.

It is an amenable number.

91297325 is a deficient number, since it is larger than the sum of its proper divisors (42265555).

91297325 is a wasteful number, since it uses less digits than its factorization.

91297325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16877 (or 16872 counting only the distinct ones).

The product of its digits is 34020, while the sum is 38.

The square root of 91297325 is about 9554.9633698932. The cubic root of 91297325 is about 450.2834839292.

The spelling of 91297325 in words is "ninety-one million, two hundred ninety-seven thousand, three hundred twenty-five".