564434989 has 2 divisors, whose sum is σ = 564434990. Its totient is φ = 564434988.

The previous prime is 564434977. The next prime is 564434993. The reversal of 564434989 is 989434465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 554979364 + 9455625 = 23558^2 + 3075^2 .

It is a cyclic number.

It is not a de Polignac number, because 564434989 - 2⁷ = 564434861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (564434909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 282217494 + 282217495.

It is an arithmetic number, because the mean of its divisors is an integer number (282217495).

Almost surely, 2^564434989 is an apocalyptic number.

It is an amenable number.

564434989 is a deficient number, since it is larger than the sum of its proper divisors (1).

564434989 is an equidigital number, since it uses as much as digits as its factorization.

564434989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 52.

The square root of 564434989 is about 23757.8405794803. The cubic root of 564434989 is about 826.4272760224.

The spelling of 564434989 in words is "five hundred sixty-four million, four hundred thirty-four thousand, nine hundred eighty-nine".