77422057 has 2 divisors, whose sum is σ = 77422058. Its totient is φ = 77422056.

The previous prime is 77422031. The next prime is 77422067. The reversal of 77422057 is 75022477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77369616 + 52441 = 8796^2 + 229^2 .

It is an emirp because it is prime and its reverse (75022477) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77422057 is a prime.

It is a super-2 number, since 2×77422057² = 11988349820222498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77422067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38711028 + 38711029.

It is an arithmetic number, because the mean of its divisors is an integer number (38711029).

Almost surely, 2^77422057 is an apocalyptic number.

It is an amenable number.

77422057 is a deficient number, since it is larger than the sum of its proper divisors (1).

77422057 is an equidigital number, since it uses as much as digits as its factorization.

77422057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 77422057 is about 8798.9804523024. The cubic root of 77422057 is about 426.2079718798.

The spelling of 77422057 in words is "seventy-seven million, four hundred twenty-two thousand, fifty-seven".