91560825 has 36 divisors (see below), whose sum is σ = 169298688. Its totient is φ = 47253600.

The previous prime is 91560823. The next prime is 91560851. The reversal of 91560825 is 52806519.

It is a happy number.

91560825 is a `hidden beast` number, since 91 + 560 + 8 + 2 + 5 = 666.

It is not a de Polignac number, because 91560825 - 2¹ = 91560823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91560825.

It is not an unprimeable number, because it can be changed into a prime (91560823) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 412 + ... + 13538.

Almost surely, 2^91560825 is an apocalyptic number.

It is an amenable number.

91560825 is a deficient number, since it is larger than the sum of its proper divisors (77737863).

91560825 is a wasteful number, since it uses less digits than its factorization.

91560825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13174 (or 13166 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 91560825 is about 9568.7420803364. The cubic root of 91560825 is about 450.7162667180.

The spelling of 91560825 in words is "ninety-one million, five hundred sixty thousand, eight hundred twenty-five".