556943 has 2 divisors, whose sum is σ = 556944. Its totient is φ = 556942.

The previous prime is 556939. The next prime is 556957. The reversal of 556943 is 349655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 556943 - 2² = 556939 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278471 + 278472.

It is an arithmetic number, because the mean of its divisors is an integer number (278472).

2⁵⁵⁶⁹⁴³ is an apocalyptic number.

556943 is a deficient number, since it is larger than the sum of its proper divisors (1).

556943 is an equidigital number, since it uses as much as digits as its factorization.

556943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 556943 is about 746.2861381535. The cubic root of 556943 is about 82.2754468985.

The spelling of 556943 in words is "five hundred fifty-six thousand, nine hundred forty-three".