77130457 has 2 divisors, whose sum is σ = 77130458. Its totient is φ = 77130456.

The previous prime is 77130451. The next prime is 77130461. The reversal of 77130457 is 75403177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53743561 + 23386896 = 7331^2 + 4836^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77130457 is a prime.

It is not a weakly prime, because it can be changed into another prime (77130451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38565228 + 38565229.

It is an arithmetic number, because the mean of its divisors is an integer number (38565229).

Almost surely, 2^77130457 is an apocalyptic number.

It is an amenable number.

77130457 is a deficient number, since it is larger than the sum of its proper divisors (1).

77130457 is an equidigital number, since it uses as much as digits as its factorization.

77130457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 77130457 is about 8782.3947189818. The cubic root of 77130457 is about 425.6722132616.

The spelling of 77130457 in words is "seventy-seven million, one hundred thirty thousand, four hundred fifty-seven".