556994 has 4 divisors (see below), whose sum is σ = 835494. Its totient is φ = 278496.

The previous prime is 556987. The next prime is 556999. The reversal of 556994 is 499655.

556994 is nontrivially palindromic in base 8.

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

It can be written as a sum of positive squares in only one way, i.e., 366025 + 190969 = 605^2 + 437^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 556994.

It is not an unprimeable number, because it can be changed into a prime (556999) 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 as a sum of consecutive naturals, namely, 139247 + ... + 139250.

2⁵⁵⁶⁹⁹⁴ is an apocalyptic number.

556994 is a deficient number, since it is larger than the sum of its proper divisors (278500).

556994 is a wasteful number, since it uses less digits than its factorization.

556994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278499.

The product of its digits is 48600, while the sum is 38.

The square root of 556994 is about 746.3203065708. The cubic root of 556994 is about 82.2779581787.

The spelling of 556994 in words is "five hundred fifty-six thousand, nine hundred ninety-four".