91563625 has 8 divisors (see below), whose sum is σ = 114271560. Its totient is φ = 73250800.

The previous prime is 91563617. The next prime is 91563673. The reversal of 91563625 is 52636519.

It can be written as a sum of positive squares in 4 ways, for example, as 876096 + 90687529 = 936^2 + 9523^2 .

It is not a de Polignac number, because 91563625 - 2³ = 91563617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366130 + ... + 366379.

It is an arithmetic number, because the mean of its divisors is an integer number (14283945).

Almost surely, 2^91563625 is an apocalyptic number.

It is an amenable number.

91563625 is a deficient number, since it is larger than the sum of its proper divisors (22707935).

91563625 is an equidigital number, since it uses as much as digits as its factorization.

91563625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732524 (or 732514 counting only the distinct ones).

The product of its digits is 48600, while the sum is 37.

The square root of 91563625 is about 9568.8883889405. Note that the first 3 decimals coincide. The cubic root of 91563625 is about 450.7208610872.

The spelling of 91563625 in words is "ninety-one million, five hundred sixty-three thousand, six hundred twenty-five".