564664309 has 4 divisors (see below), whose sum is σ = 615997440. Its totient is φ = 513331180.

The previous prime is 564664301. The next prime is 564664339. The reversal of 564664309 is 903466465.

564664309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 564664309 - 2³ = 564664301 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 (564664301) 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, 25666549 + ... + 25666570.

It is an arithmetic number, because the mean of its divisors is an integer number (153999360).

Almost surely, 2^564664309 is an apocalyptic number.

It is an amenable number.

564664309 is a deficient number, since it is larger than the sum of its proper divisors (51333131).

564664309 is a wasteful number, since it uses less digits than its factorization.

564664309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51333130.

The product of its (nonzero) digits is 466560, while the sum is 43.

The square root of 564664309 is about 23762.6662855834. Note that the first 3 decimals coincide. The cubic root of 564664309 is about 826.5391818201.

The spelling of 564664309 in words is "five hundred sixty-four million, six hundred sixty-four thousand, three hundred nine".