564989 has 2 divisors, whose sum is σ = 564990. Its totient is φ = 564988.

The previous prime is 564983. The next prime is 564997. The reversal of 564989 is 989465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284089 + 280900 = 533^2 + 530^2 .

It is a cyclic number.

It is not a de Polignac number, because 564989 - 2⁴ = 564973 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564983) 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 as a sum of consecutive naturals, namely, 282494 + 282495.

It is an arithmetic number, because the mean of its divisors is an integer number (282495).

2⁵⁶⁴⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

564989 is a deficient number, since it is larger than the sum of its proper divisors (1).

564989 is an equidigital number, since it uses as much as digits as its factorization.

564989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 564989 is about 751.6575017919. The cubic root of 564989 is about 82.6697575876.

The spelling of 564989 in words is "five hundred sixty-four thousand, nine hundred eighty-nine".