77310157 has 2 divisors, whose sum is σ = 77310158. Its totient is φ = 77310156.

The previous prime is 77310137. The next prime is 77310179. The reversal of 77310157 is 75101377.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75707401 + 1602756 = 8701^2 + 1266^2 .

It is a cyclic number.

It is not a de Polignac number, because 77310157 - 2⁷ = 77310029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77310137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38655078 + 38655079.

It is an arithmetic number, because the mean of its divisors is an integer number (38655079).

Almost surely, 2^77310157 is an apocalyptic number.

It is an amenable number.

77310157 is a deficient number, since it is larger than the sum of its proper divisors (1).

77310157 is an equidigital number, since it uses as much as digits as its factorization.

77310157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5145, while the sum is 31.

The square root of 77310157 is about 8792.6194617986. The cubic root of 77310157 is about 426.0025365921.

The spelling of 77310157 in words is "seventy-seven million, three hundred ten thousand, one hundred fifty-seven".