457856779 has 2 divisors, whose sum is σ = 457856780. Its totient is φ = 457856778.

The previous prime is 457856747. The next prime is 457856807. The reversal of 457856779 is 977658754.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 457856779 - 2⁵ = 457856747 is a prime.

It is not a weakly prime, because it can be changed into another prime (457856279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228928389 + 228928390.

It is an arithmetic number, because the mean of its divisors is an integer number (228928390).

Almost surely, 2^457856779 is an apocalyptic number.

457856779 is a deficient number, since it is larger than the sum of its proper divisors (1).

457856779 is an equidigital number, since it uses as much as digits as its factorization.

457856779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14817600, while the sum is 58.

The square root of 457856779 is about 21397.5881584818. The cubic root of 457856779 is about 770.7435214287.

The spelling of 457856779 in words is "four hundred fifty-seven million, eight hundred fifty-six thousand, seven hundred seventy-nine".