561422957 has 2 divisors, whose sum is σ = 561422958. Its totient is φ = 561422956.

The previous prime is 561422923. The next prime is 561422969. The reversal of 561422957 is 759224165.

561422957 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384905161 + 176517796 = 19619^2 + 13286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561422957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561428957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280711478 + 280711479.

It is an arithmetic number, because the mean of its divisors is an integer number (280711479).

Almost surely, 2^561422957 is an apocalyptic number.

It is an amenable number.

561422957 is a deficient number, since it is larger than the sum of its proper divisors (1).

561422957 is an equidigital number, since it uses as much as digits as its factorization.

561422957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 561422957 is about 23694.3655116570. The cubic root of 561422957 is about 824.9546137260.

The spelling of 561422957 in words is "five hundred sixty-one million, four hundred twenty-two thousand, nine hundred fifty-seven".