564739 has 4 divisors (see below), whose sum is σ = 645424. Its totient is φ = 484056.

The previous prime is 564713. The next prime is 564761. The reversal of 564739 is 937465.

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

It is a cyclic number.

It is not a de Polignac number, because 564739 - 2⁹ = 564227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (564709) 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, 40332 + ... + 40345.

It is an arithmetic number, because the mean of its divisors is an integer number (161356).

2⁵⁶⁴⁷³⁹ is an apocalyptic number.

564739 is a deficient number, since it is larger than the sum of its proper divisors (80685).

564739 is an equidigital number, since it uses as much as digits as its factorization.

564739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80684.

The product of its digits is 22680, while the sum is 34.

The square root of 564739 is about 751.4911842464. The cubic root of 564739 is about 82.6575623717.

The spelling of 564739 in words is "five hundred sixty-four thousand, seven hundred thirty-nine".