564364989 has 10 divisors (see below), whose sum is σ = 843063870. Its totient is φ = 376243272.

The previous prime is 564364987. The next prime is 564364991. The reversal of 564364989 is 989463465.

564364989 is a `hidden beast` number, since 564 + 36 + 49 + 8 + 9 = 666.

564364989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (564364987) and next prime (564364991).

It can be written as a sum of positive squares in only one way, i.e., 471628089 + 92736900 = 21717^2 + 9630^2 .

It is not a de Polignac number, because 564364989 - 2¹ = 564364987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (564364987) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3483654 + ... + 3483815.

It is an arithmetic number, because the mean of its divisors is an integer number (84306387).

Almost surely, 2^564364989 is an apocalyptic number.

It is an amenable number.

564364989 is a deficient number, since it is larger than the sum of its proper divisors (278698881).

564364989 is an equidigital number, since it uses as much as digits as its factorization.

564364989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6967481 (or 6967472 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The square root of 564364989 is about 23756.3673359375. The cubic root of 564364989 is about 826.3931107054.

It can be divided in two parts, 56436 and 4989, that added together give a triangular number (61425 = T₃₅₀).

The spelling of 564364989 in words is "five hundred sixty-four million, three hundred sixty-four thousand, nine hundred eighty-nine".