556405943 has 4 divisors (see below), whose sum is σ = 557323200. Its totient is φ = 555488688.

The previous prime is 556405907. The next prime is 556405981. The reversal of 556405943 is 349504655.

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 556405943 - 2¹² = 556401847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 556405943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556405543) 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 in 3 ways as a sum of consecutive naturals, for example, 457718 + ... + 458931.

It is an arithmetic number, because the mean of its divisors is an integer number (139330800).

Almost surely, 2^556405943 is an apocalyptic number.

556405943 is a deficient number, since it is larger than the sum of its proper divisors (917257).

556405943 is an equidigital number, since it uses as much as digits as its factorization.

556405943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917256.

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 556405943 is about 23588.2585834563. The cubic root of 556405943 is about 822.4899247664.

The spelling of 556405943 in words is "five hundred fifty-six million, four hundred five thousand, nine hundred forty-three".