91275685 has 8 divisors (see below), whose sum is σ = 109582200. Its totient is φ = 72986304.

The previous prime is 91275659. The next prime is 91275689. The reversal of 91275685 is 58657219.

It can be written as a sum of positive squares in 4 ways, for example, as 31708161 + 59567524 = 5631^2 + 7718^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91275685 - 2²⁵ = 57721253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91275689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17791 + ... + 22339.

It is an arithmetic number, because the mean of its divisors is an integer number (13697775).

Almost surely, 2^91275685 is an apocalyptic number.

It is an amenable number.

91275685 is a deficient number, since it is larger than the sum of its proper divisors (18306515).

91275685 is a wasteful number, since it uses less digits than its factorization.

91275685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8567.

The product of its digits is 151200, while the sum is 43.

The square root of 91275685 is about 9553.8309070236. The cubic root of 91275685 is about 450.2479045568.

The spelling of 91275685 in words is "ninety-one million, two hundred seventy-five thousand, six hundred eighty-five".