564691213 has 4 divisors (see below), whose sum is σ = 573948508. Its totient is φ = 555433920.

The previous prime is 564691207. The next prime is 564691243. The reversal of 564691213 is 312196465.

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 190384804 + 374306409 = 13798^2 + 19347^2 .

It is a cyclic number.

It is not a de Polignac number, because 564691213 - 2⁵ = 564691181 is a prime.

It is a super-2 number, since 2×564691213² = 637752332078822738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564691243) 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, 4628556 + ... + 4628677.

It is an arithmetic number, because the mean of its divisors is an integer number (143487127).

Almost surely, 2^564691213 is an apocalyptic number.

It is an amenable number.

564691213 is a deficient number, since it is larger than the sum of its proper divisors (9257295).

564691213 is an equidigital number, since it uses as much as digits as its factorization.

564691213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9257294.

The product of its digits is 38880, while the sum is 37.

The square root of 564691213 is about 23763.2323769305. The cubic root of 564691213 is about 826.5523087090.

The spelling of 564691213 in words is "five hundred sixty-four million, six hundred ninety-one thousand, two hundred thirteen".