564961289 has 4 divisors (see below), whose sum is σ = 598194324. Its totient is φ = 531728256.

The previous prime is 564961249. The next prime is 564961297. The reversal of 564961289 is 982169465.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 252555664 + 312405625 = 15892^2 + 17675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-564961289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (564961249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16616492 + ... + 16616525.

It is an arithmetic number, because the mean of its divisors is an integer number (149548581).

Almost surely, 2^564961289 is an apocalyptic number.

It is an amenable number.

564961289 is a deficient number, since it is larger than the sum of its proper divisors (33233035).

564961289 is a wasteful number, since it uses less digits than its factorization.

564961289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33233034.

The product of its digits is 933120, while the sum is 50.

The square root of 564961289 is about 23768.9143420561. The cubic root of 564961289 is about 826.6840599842.

The spelling of 564961289 in words is "five hundred sixty-four million, nine hundred sixty-one thousand, two hundred eighty-nine".