561972589 has 2 divisors, whose sum is σ = 561972590. Its totient is φ = 561972588.

The previous prime is 561972571. The next prime is 561972599. The reversal of 561972589 is 985279165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553660900 + 8311689 = 23530^2 + 2883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561972589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561972569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280986294 + 280986295.

It is an arithmetic number, because the mean of its divisors is an integer number (280986295).

Almost surely, 2^561972589 is an apocalyptic number.

It is an amenable number.

561972589 is a deficient number, since it is larger than the sum of its proper divisors (1).

561972589 is an equidigital number, since it uses as much as digits as its factorization.

561972589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360800, while the sum is 52.

The square root of 561972589 is about 23705.9610435856. The cubic root of 561972589 is about 825.2237355843.

The spelling of 561972589 in words is "five hundred sixty-one million, nine hundred seventy-two thousand, five hundred eighty-nine".