564725309 has 4 divisors (see below), whose sum is σ = 566298720. Its totient is φ = 563151900.

The previous prime is 564725263. The next prime is 564725327. The reversal of 564725309 is 903527465.

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: 903527465 = 5 ⋅180705493.

It is a cyclic number.

It is not a de Polignac number, because 564725309 - 2¹⁶ = 564659773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564725209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786167 + ... + 786884.

It is an arithmetic number, because the mean of its divisors is an integer number (141574680).

Almost surely, 2^564725309 is an apocalyptic number.

It is an amenable number.

564725309 is a deficient number, since it is larger than the sum of its proper divisors (1573411).

564725309 is a wasteful number, since it uses less digits than its factorization.

564725309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573410.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 564725309 is about 23763.9497769205. The cubic root of 564725309 is about 826.5689440899.

The spelling of 564725309 in words is "five hundred sixty-four million, seven hundred twenty-five thousand, three hundred nine".