91164357 has 12 divisors (see below), whose sum is σ = 131764620. Its totient is φ = 60738048.

The previous prime is 91164347. The next prime is 91164379. The reversal of 91164357 is 75346119.

91164357 is a `hidden beast` number, since 9 + 1 + 1 + 643 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 69205761 + 21958596 = 8319^2 + 4686^2 .

It is not a de Polignac number, because 91164357 - 2²² = 86970053 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91164347) 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, 26619 + ... + 29847.

It is an arithmetic number, because the mean of its divisors is an integer number (10980385).

Almost surely, 2^91164357 is an apocalyptic number.

It is an amenable number.

91164357 is a deficient number, since it is larger than the sum of its proper divisors (40600263).

91164357 is a wasteful number, since it uses less digits than its factorization.

91164357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6372 (or 6369 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 91164357 is about 9548.0027754500. The cubic root of 91164357 is about 450.0647758605.

The spelling of 91164357 in words is "ninety-one million, one hundred sixty-four thousand, three hundred fifty-seven".