564389 has 4 divisors (see below), whose sum is σ = 645024. Its totient is φ = 483756.

The previous prime is 564373. The next prime is 564391. The reversal of 564389 is 983465.

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.

It is not a de Polignac number, because 564389 - 2⁴ = 564373 is a prime.

It is a d-powerful number, because it can be written as 5³ + 6² + 3 + 4² + 8⁵ + 9⁶ .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564359) 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, 40307 + ... + 40320.

It is an arithmetic number, because the mean of its divisors is an integer number (161256).

2⁵⁶⁴³⁸⁹ is an apocalyptic number.

It is an amenable number.

564389 is a deficient number, since it is larger than the sum of its proper divisors (80635).

564389 is an equidigital number, since it uses as much as digits as its factorization.

564389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80634.

The product of its digits is 25920, while the sum is 35.

The square root of 564389 is about 751.2582778246. The cubic root of 564389 is about 82.6404830216.

The spelling of 564389 in words is "five hundred sixty-four thousand, three hundred eighty-nine".