564209 has 4 divisors (see below), whose sum is σ = 569316. Its totient is φ = 559104.

The previous prime is 564197. The next prime is 564227. The reversal of 564209 is 902465.

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 78400 + 485809 = 280^2 + 697^2 .

It is a cyclic number.

It is not a de Polignac number, because 564209 - 2¹² = 560113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2384 + ... + 2609.

It is an arithmetic number, because the mean of its divisors is an integer number (142329).

564209 is a Friedman number, since it can be written as 9^6+(4*(2+0))^5, using all its digits and the basic arithmetic operations.

2⁵⁶⁴²⁰⁹ is an apocalyptic number.

It is an amenable number.

564209 is a deficient number, since it is larger than the sum of its proper divisors (5107).

564209 is a wasteful number, since it uses less digits than its factorization.

564209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 564209 is about 751.1384692585. The cubic root of 564209 is about 82.6316966062.

The spelling of 564209 in words is "five hundred sixty-four thousand, two hundred nine".