556623 has 12 divisors (see below), whose sum is σ = 839280. Its totient is φ = 354816.

The previous prime is 556613. The next prime is 556627. The reversal of 556623 is 326655.

556623 = T₁₃₂ + T₁₃₃ + ... + T₁₇₇.

It is not a de Polignac number, because 556623 - 2⁴ = 556607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1138 + ... + 1551.

It is an arithmetic number, because the mean of its divisors is an integer number (69940).

2⁵⁵⁶⁶²³ is an apocalyptic number.

556623 is a deficient number, since it is larger than the sum of its proper divisors (282657).

556623 is a wasteful number, since it uses less digits than its factorization.

556623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718 (or 2715 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 556623 is about 746.0717123709. The cubic root of 556623 is about 82.2596863467.

The spelling of 556623 in words is "five hundred fifty-six thousand, six hundred twenty-three".