77070157 has 2 divisors, whose sum is σ = 77070158. Its totient is φ = 77070156.

The previous prime is 77070073. The next prime is 77070187. The reversal of 77070157 is 75107077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71048041 + 6022116 = 8429^2 + 2454^2 .

It is a cyclic number.

It is not a de Polignac number, because 77070157 - 2¹⁹ = 76545869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77070187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38535078 + 38535079.

It is an arithmetic number, because the mean of its divisors is an integer number (38535079).

Almost surely, 2^77070157 is an apocalyptic number.

It is an amenable number.

77070157 is a deficient number, since it is larger than the sum of its proper divisors (1).

77070157 is an equidigital number, since it uses as much as digits as its factorization.

77070157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12005, while the sum is 34.

The square root of 77070157 is about 8778.9610433126. The cubic root of 77070157 is about 425.5612552502.

The spelling of 77070157 in words is "seventy-seven million, seventy thousand, one hundred fifty-seven".