556729 has 4 divisors (see below), whose sum is σ = 574720. Its totient is φ = 538740.

The previous prime is 556727. The next prime is 556741. The reversal of 556729 is 927655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 927655 = 5 ⋅185531.

It is a cyclic number.

It is not a de Polignac number, because 556729 - 2¹ = 556727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556694 and 556703.

It is not an unprimeable number, because it can be changed into a prime (556723) 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, 8949 + ... + 9010.

It is an arithmetic number, because the mean of its divisors is an integer number (143680).

556729 is a Friedman number, since it can be written as (6^7-9)*2-5^5, using all its digits and the basic arithmetic operations.

2⁵⁵⁶⁷²⁹ is an apocalyptic number.

It is an amenable number.

556729 is a deficient number, since it is larger than the sum of its proper divisors (17991).

556729 is a wasteful number, since it uses less digits than its factorization.

556729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17990.

The product of its digits is 18900, while the sum is 34.

The square root of 556729 is about 746.1427477367. The cubic root of 556729 is about 82.2649076984.

The spelling of 556729 in words is "five hundred fifty-six thousand, seven hundred twenty-nine".