91377157 has 2 divisors, whose sum is σ = 91377158. Its totient is φ = 91377156.

The previous prime is 91377133. The next prime is 91377191. The reversal of 91377157 is 75177319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74063236 + 17313921 = 8606^2 + 4161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91377157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91377257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45688578 + 45688579.

It is an arithmetic number, because the mean of its divisors is an integer number (45688579).

Almost surely, 2^91377157 is an apocalyptic number.

It is an amenable number.

91377157 is a deficient number, since it is larger than the sum of its proper divisors (1).

91377157 is an equidigital number, since it uses as much as digits as its factorization.

91377157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46305, while the sum is 40.

The square root of 91377157 is about 9559.1399717757. The cubic root of 91377157 is about 450.4146909812.

The spelling of 91377157 in words is "ninety-one million, three hundred seventy-seven thousand, one hundred fifty-seven".