556957997 has 4 divisors (see below), whose sum is σ = 574924416. Its totient is φ = 538991580.

The previous prime is 556957991. The next prime is 556958033. The reversal of 556957997 is 799759655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 556957997 - 2⁸ = 556957741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556957991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8983163 + ... + 8983224.

It is an arithmetic number, because the mean of its divisors is an integer number (143731104).

Almost surely, 2^556957997 is an apocalyptic number.

It is an amenable number.

556957997 is a deficient number, since it is larger than the sum of its proper divisors (17966419).

556957997 is a wasteful number, since it uses less digits than its factorization.

556957997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17966418.

The product of its digits is 26790750, while the sum is 62.

The square root of 556957997 is about 23599.9575635212. The cubic root of 556957997 is about 822.7618537853.

The spelling of 556957997 in words is "five hundred fifty-six million, nine hundred fifty-seven thousand, nine hundred ninety-seven".