91157337 has 6 divisors (see below), whose sum is σ = 131671722. Its totient is φ = 60771552.

The previous prime is 91157321. The next prime is 91157351. The reversal of 91157337 is 73375119.

It can be written as a sum of positive squares in only one way, i.e., 88003161 + 3154176 = 9381^2 + 1776^2 .

It is not a de Polignac number, because 91157337 - 2⁴ = 91157321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91157317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5064288 + ... + 5064305.

It is an arithmetic number, because the mean of its divisors is an integer number (21945287).

Almost surely, 2^91157337 is an apocalyptic number.

It is an amenable number.

91157337 is a deficient number, since it is larger than the sum of its proper divisors (40514385).

91157337 is a wasteful number, since it uses less digits than its factorization.

91157337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10128599 (or 10128596 counting only the distinct ones).

The product of its digits is 19845, while the sum is 36.

The square root of 91157337 is about 9547.6351522249. The cubic root of 91157337 is about 450.0532233344.

The spelling of 91157337 in words is "ninety-one million, one hundred fifty-seven thousand, three hundred thirty-seven".