91613025 has 120 divisors (see below), whose sum is σ = 203094144. Its totient is φ = 39916800.

The previous prime is 91613021. The next prime is 91613063. The reversal of 91613025 is 52031619.

It is not a de Polignac number, because 91613025 - 2² = 91613021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 91613025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91613021) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 325885 + ... + 326165.

Almost surely, 2^91613025 is an apocalyptic number.

It is an amenable number.

91613025 is an abundant number, since it is smaller than the sum of its proper divisors (111481119).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91613025 is a wasteful number, since it uses less digits than its factorization.

91613025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 91613025 is about 9571.4693229410. The cubic root of 91613025 is about 450.8019034863.

The spelling of 91613025 in words is "ninety-one million, six hundred thirteen thousand, twenty-five".