91370725 has 6 divisors (see below), whose sum is σ = 113299730. Its totient is φ = 73096560.

The previous prime is 91370711. The next prime is 91370731. The reversal of 91370725 is 52707319.

It can be written as a sum of positive squares in 3 ways, for example, as 91809 + 91278916 = 303^2 + 9554^2 .

It is not a de Polignac number, because 91370725 - 2¹¹ = 91368677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1827390 + ... + 1827439.

Almost surely, 2^91370725 is an apocalyptic number.

It is an amenable number.

91370725 is a deficient number, since it is larger than the sum of its proper divisors (21929005).

91370725 is a wasteful number, since it uses less digits than its factorization.

91370725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654839 (or 3654834 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 91370725 is about 9558.8035339157. The cubic root of 91370725 is about 450.4041225657.

The spelling of 91370725 in words is "ninety-one million, three hundred seventy thousand, seven hundred twenty-five".