556889 has 4 divisors (see below), whose sum is σ = 558756. Its totient is φ = 555024.

The previous prime is 556883. The next prime is 556891. The reversal of 556889 is 988655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 403225 + 153664 = 635^2 + 392^2 .

It is not a de Polignac number, because 556889 - 2¹² = 552793 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 374 + ... + 1119.

It is an arithmetic number, because the mean of its divisors is an integer number (139689).

2⁵⁵⁶⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

556889 is a deficient number, since it is larger than the sum of its proper divisors (1867).

556889 is a wasteful number, since it uses less digits than its factorization.

556889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1866.

The product of its digits is 86400, while the sum is 41.

The square root of 556889 is about 746.2499581240. The cubic root of 556889 is about 82.2727877289.

The spelling of 556889 in words is "five hundred fifty-six thousand, eight hundred eighty-nine".