77455057 has 2 divisors, whose sum is σ = 77455058. Its totient is φ = 77455056.

The previous prime is 77455031. The next prime is 77455061. The reversal of 77455057 is 75055477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42302016 + 35153041 = 6504^2 + 5929^2 .

It is a cyclic number.

It is not a de Polignac number, because 77455057 - 2²³ = 69066449 is a prime.

It is not a weakly prime, because it can be changed into another prime (77455067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38727528 + 38727529.

It is an arithmetic number, because the mean of its divisors is an integer number (38727529).

Almost surely, 2^77455057 is an apocalyptic number.

It is an amenable number.

77455057 is a deficient number, since it is larger than the sum of its proper divisors (1).

77455057 is an equidigital number, since it uses as much as digits as its factorization.

77455057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 171500, while the sum is 40.

The square root of 77455057 is about 8800.8554697825. The cubic root of 77455057 is about 426.2685182141.

The spelling of 77455057 in words is "seventy-seven million, four hundred fifty-five thousand, fifty-seven".