564689 has 8 divisors (see below), whose sum is σ = 609120. Its totient is φ = 521536.

The previous prime is 564679. The next prime is 564701. The reversal of 564689 is 986465.

564689 = 112² + 113² + ... + 145².

564689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-564689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (76140).

2⁵⁶⁴⁶⁸⁹ is an apocalyptic number.

564689 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

564689 is a deficient number, since it is larger than the sum of its proper divisors (44431).

564689 is a wasteful number, since it uses less digits than its factorization.

564689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its digits is 51840, while the sum is 38.

The square root of 564689 is about 751.4579163200. The cubic root of 564689 is about 82.6551228967.

The spelling of 564689 in words is "five hundred sixty-four thousand, six hundred eighty-nine".