77465257 has 2 divisors, whose sum is σ = 77465258. Its totient is φ = 77465256.

The previous prime is 77465251. The next prime is 77465273. The reversal of 77465257 is 75256477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49787136 + 27678121 = 7056^2 + 5261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77465257 is a prime.

It is not a weakly prime, because it can be changed into another prime (77465251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38732628 + 38732629.

It is an arithmetic number, because the mean of its divisors is an integer number (38732629).

Almost surely, 2^77465257 is an apocalyptic number.

It is an amenable number.

77465257 is a deficient number, since it is larger than the sum of its proper divisors (1).

77465257 is an equidigital number, since it uses as much as digits as its factorization.

77465257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411600, while the sum is 43.

The square root of 77465257 is about 8801.4349398266. The cubic root of 77465257 is about 426.2872290562.

The spelling of 77465257 in words is "seventy-seven million, four hundred sixty-five thousand, two hundred fifty-seven".