91247625 has 48 divisors (see below), whose sum is σ = 188003712. Its totient is φ = 41709600.

The previous prime is 91247623. The next prime is 91247641. The reversal of 91247625 is 52674219.

91247625 is a `hidden beast` number, since 9 + 1 + 24 + 7 + 625 = 666.

It is not a de Polignac number, because 91247625 - 2¹ = 91247623 is a prime.

It is a super-2 number, since 2×91247625² = 16652258136281250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91247625.

It is not an unprimeable number, because it can be changed into a prime (91247623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2082 + ... + 13668.

It is an arithmetic number, because the mean of its divisors is an integer number (3916744).

Almost surely, 2^91247625 is an apocalyptic number.

It is an amenable number.

91247625 is an abundant number, since it is smaller than the sum of its proper divisors (96756087).

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

91247625 is a wasteful number, since it uses less digits than its factorization.

91247625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11615 (or 11602 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 91247625 is about 9552.3622732809. The cubic root of 91247625 is about 450.2017613769.

The spelling of 91247625 in words is "ninety-one million, two hundred forty-seven thousand, six hundred twenty-five".