57455779 has 2 divisors, whose sum is σ = 57455780. Its totient is φ = 57455778.

The previous prime is 57455777. The next prime is 57455807. The reversal of 57455779 is 97755475.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57455779 - 2¹ = 57455777 is a prime.

Together with 57455777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (57455777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28727889 + 28727890.

It is an arithmetic number, because the mean of its divisors is an integer number (28727890).

Almost surely, 2^57455779 is an apocalyptic number.

57455779 is a deficient number, since it is larger than the sum of its proper divisors (1).

57455779 is an equidigital number, since it uses as much as digits as its factorization.

57455779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1543500, while the sum is 49.

The square root of 57455779 is about 7579.9590368286. The cubic root of 57455779 is about 385.8731607379.

The spelling of 57455779 in words is "fifty-seven million, four hundred fifty-five thousand, seven hundred seventy-nine".