557455907 has 4 divisors (see below), whose sum is σ = 558177840. Its totient is φ = 556733976.

The previous prime is 557455903. The next prime is 557455909. The reversal of 557455907 is 709554755.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 557455907 - 2² = 557455903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (557455901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359807 + ... + 361352.

It is an arithmetic number, because the mean of its divisors is an integer number (139544460).

Almost surely, 2^557455907 is an apocalyptic number.

557455907 is a deficient number, since it is larger than the sum of its proper divisors (721933).

557455907 is an equidigital number, since it uses as much as digits as its factorization.

557455907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721932.

The product of its (nonzero) digits is 1102500, while the sum is 47.

The square root of 557455907 is about 23610.5041665781. The cubic root of 557455907 is about 823.0069586471.

The spelling of 557455907 in words is "five hundred fifty-seven million, four hundred fifty-five thousand, nine hundred seven".