91584725 has 12 divisors (see below), whose sum is σ = 113786244. Its totient is φ = 73125120.

The previous prime is 91584719. The next prime is 91584749. The reversal of 91584725 is 52748519.

It can be written as a sum of positive squares in 6 ways, for example, as 152881 + 91431844 = 391^2 + 9562^2 .

It is not a de Polignac number, because 91584725 - 2⁸ = 91584469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10637 + ... + 17213.

It is an arithmetic number, because the mean of its divisors is an integer number (9482187).

Almost surely, 2^91584725 is an apocalyptic number.

It is an amenable number.

91584725 is a deficient number, since it is larger than the sum of its proper divisors (22201519).

91584725 is a wasteful number, since it uses less digits than its factorization.

91584725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144 (or 7139 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 91584725 is about 9569.9908568399. The cubic root of 91584725 is about 450.7554799283.

The spelling of 91584725 in words is "ninety-one million, five hundred eighty-four thousand, seven hundred twenty-five".