557445979 has 2 divisors, whose sum is σ = 557445980. Its totient is φ = 557445978.

The previous prime is 557445961. The next prime is 557445989. The reversal of 557445979 is 979544755.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557445979 - 2¹⁷ = 557314907 is a prime.

It is not a weakly prime, because it can be changed into another prime (557445919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278722989 + 278722990.

It is an arithmetic number, because the mean of its divisors is an integer number (278722990).

Almost surely, 2^557445979 is an apocalyptic number.

557445979 is a deficient number, since it is larger than the sum of its proper divisors (1).

557445979 is an equidigital number, since it uses as much as digits as its factorization.

557445979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7938000, while the sum is 55.

The square root of 557445979 is about 23610.2939202374. The cubic root of 557445979 is about 823.0020728427.

The spelling of 557445979 in words is "five hundred fifty-seven million, four hundred forty-five thousand, nine hundred seventy-nine".