91133825 has 12 divisors (see below), whose sum is σ = 114599808. Its totient is φ = 71878800.

The previous prime is 91133773. The next prime is 91133827. The reversal of 91133825 is 52833119.

It is a de Polignac number, because none of the positive numbers 2^k-91133825 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91133791 and 91133800.

It is not an unprimeable number, because it can be changed into a prime (91133827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23897 + ... + 27446.

It is an arithmetic number, because the mean of its divisors is an integer number (9549984).

Almost surely, 2^91133825 is an apocalyptic number.

It is an amenable number.

91133825 is a deficient number, since it is larger than the sum of its proper divisors (23465983).

91133825 is a wasteful number, since it uses less digits than its factorization.

91133825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51424 (or 51419 counting only the distinct ones).

The product of its digits is 6480, while the sum is 32.

The square root of 91133825 is about 9546.4037731493. The cubic root of 91133825 is about 450.0145262800.

The spelling of 91133825 in words is "ninety-one million, one hundred thirty-three thousand, eight hundred twenty-five".