157697377 has 2 divisors, whose sum is σ = 157697378. Its totient is φ = 157697376.

The previous prime is 157697333. The next prime is 157697381. The reversal of 157697377 is 773796751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125081856 + 32615521 = 11184^2 + 5711^2 .

It is a cyclic number.

It is not a de Polignac number, because 157697377 - 2⁷ = 157697249 is a prime.

It is not a weakly prime, because it can be changed into another prime (157697317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78848688 + 78848689.

It is an arithmetic number, because the mean of its divisors is an integer number (78848689).

Almost surely, 2^157697377 is an apocalyptic number.

It is an amenable number.

157697377 is a deficient number, since it is larger than the sum of its proper divisors (1).

157697377 is an equidigital number, since it uses as much as digits as its factorization.

157697377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944810, while the sum is 52.

The square root of 157697377 is about 12557.7616237927. The cubic root of 157697377 is about 540.2666458608.

The spelling of 157697377 in words is "one hundred fifty-seven million, six hundred ninety-seven thousand, three hundred seventy-seven".