91713525 has 12 divisors (see below), whose sum is σ = 151633152. Its totient is φ = 48913840.

The previous prime is 91713511. The next prime is 91713527. The reversal of 91713525 is 52531719.

It is not a de Polignac number, because 91713525 - 2¹⁶ = 91647989 is a prime.

It is a super-2 number, since 2×91713525² = 16822741335851250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91713527) 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, 611349 + ... + 611498.

It is an arithmetic number, because the mean of its divisors is an integer number (12636096).

Almost surely, 2^91713525 is an apocalyptic number.

It is an amenable number.

91713525 is a deficient number, since it is larger than the sum of its proper divisors (59919627).

91713525 is a wasteful number, since it uses less digits than its factorization.

91713525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222860 (or 1222855 counting only the distinct ones).

The product of its digits is 9450, while the sum is 33.

The square root of 91713525 is about 9576.7178615641. The cubic root of 91713525 is about 450.9666873132.

The spelling of 91713525 in words is "ninety-one million, seven hundred thirteen thousand, five hundred twenty-five".