564026621 has 2 divisors, whose sum is σ = 564026622. Its totient is φ = 564026620.

The previous prime is 564026531. The next prime is 564026623. The reversal of 564026621 is 126620465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539632900 + 24393721 = 23230^2 + 4939^2 .

It is a cyclic number.

It is not a de Polignac number, because 564026621 - 2¹⁰ = 564025597 is a prime.

Together with 564026623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564026623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282013310 + 282013311.

It is an arithmetic number, because the mean of its divisors is an integer number (282013311).

Almost surely, 2^564026621 is an apocalyptic number.

It is an amenable number.

564026621 is a deficient number, since it is larger than the sum of its proper divisors (1).

564026621 is an equidigital number, since it uses as much as digits as its factorization.

564026621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 564026621 is about 23749.2446406196. The cubic root of 564026621 is about 826.2279215745.

The spelling of 564026621 in words is "five hundred sixty-four million, twenty-six thousand, six hundred twenty-one".