91308625 has 8 divisors (see below), whose sum is σ = 113953320. Its totient is φ = 73046800.

The previous prime is 91308589. The next prime is 91308629. The reversal of 91308625 is 52680319.

It can be written as a sum of positive squares in 4 ways, for example, as 4613904 + 86694721 = 2148^2 + 9311^2 .

It is not a de Polignac number, because 91308625 - 2²³ = 82920017 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91308629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365110 + ... + 365359.

It is an arithmetic number, because the mean of its divisors is an integer number (14244165).

Almost surely, 2^91308625 is an apocalyptic number.

It is an amenable number.

91308625 is a deficient number, since it is larger than the sum of its proper divisors (22644695).

91308625 is an equidigital number, since it uses as much as digits as its factorization.

91308625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730484 (or 730474 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 91308625 is about 9555.5546673126. The cubic root of 91308625 is about 450.3020605723.

The spelling of 91308625 in words is "ninety-one million, three hundred eight thousand, six hundred twenty-five".