77696057 has 2 divisors, whose sum is σ = 77696058. Its totient is φ = 77696056.

The previous prime is 77696033. The next prime is 77696071. The reversal of 77696057 is 75069677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43309561 + 34386496 = 6581^2 + 5864^2 .

It is a cyclic number.

It is not a de Polignac number, because 77696057 - 2¹² = 77691961 is a prime.

It is not a weakly prime, because it can be changed into another prime (77696257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38848028 + 38848029.

It is an arithmetic number, because the mean of its divisors is an integer number (38848029).

Almost surely, 2^77696057 is an apocalyptic number.

It is an amenable number.

77696057 is a deficient number, since it is larger than the sum of its proper divisors (1).

77696057 is an equidigital number, since it uses as much as digits as its factorization.

77696057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 555660, while the sum is 47.

The square root of 77696057 is about 8814.5366866331. The cubic root of 77696057 is about 426.7101693789.

It can be divided in two parts, 7769605 and 7, that multiplied together give a triangular number (54387235 = T₁₀₄₂₉).

The spelling of 77696057 in words is "seventy-seven million, six hundred ninety-six thousand, fifty-seven".