564338861 has 2 divisors, whose sum is σ = 564338862. Its totient is φ = 564338860.

The previous prime is 564338809. The next prime is 564338903. The reversal of 564338861 is 168833465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480048100 + 84290761 = 21910^2 + 9181^2 .

It is a cyclic number.

It is not a de Polignac number, because 564338861 - 2¹⁸ = 564076717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564338461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282169430 + 282169431.

It is an arithmetic number, because the mean of its divisors is an integer number (282169431).

Almost surely, 2^564338861 is an apocalyptic number.

It is an amenable number.

564338861 is a deficient number, since it is larger than the sum of its proper divisors (1).

564338861 is an equidigital number, since it uses as much as digits as its factorization.

564338861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 564338861 is about 23755.8174138462. The cubic root of 564338861 is about 826.3803575328.

The spelling of 564338861 in words is "five hundred sixty-four million, three hundred thirty-eight thousand, eight hundred sixty-one".