557870447 has 2 divisors, whose sum is σ = 557870448. Its totient is φ = 557870446.

The previous prime is 557870441. The next prime is 557870449. The reversal of 557870447 is 744078755.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 557870447 - 2¹⁰ = 557869423 is a prime.

It is a super-2 number, since 2×557870447² = 622438871271959618, which contains 22 as substring.

Together with 557870449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557870441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278935223 + 278935224.

It is an arithmetic number, because the mean of its divisors is an integer number (278935224).

Almost surely, 2^557870447 is an apocalyptic number.

557870447 is a deficient number, since it is larger than the sum of its proper divisors (1).

557870447 is an equidigital number, since it uses as much as digits as its factorization.

557870447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1097600, while the sum is 47.

The square root of 557870447 is about 23619.2812549408. The cubic root of 557870447 is about 823.2109118612.

The spelling of 557870447 in words is "five hundred fifty-seven million, eight hundred seventy thousand, four hundred forty-seven".