561405037 has 2 divisors, whose sum is σ = 561405038. Its totient is φ = 561405036.

The previous prime is 561405029. The next prime is 561405043. The reversal of 561405037 is 730504165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508682916 + 52722121 = 22554^2 + 7261^2 .

It is a cyclic number.

It is not a de Polignac number, because 561405037 - 2³ = 561405029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561405017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280702518 + 280702519.

It is an arithmetic number, because the mean of its divisors is an integer number (280702519).

Almost surely, 2^561405037 is an apocalyptic number.

It is an amenable number.

561405037 is a deficient number, since it is larger than the sum of its proper divisors (1).

561405037 is an equidigital number, since it uses as much as digits as its factorization.

561405037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 561405037 is about 23693.9873596657. The cubic root of 561405037 is about 824.9458364196.

The spelling of 561405037 in words is "five hundred sixty-one million, four hundred five thousand, thirty-seven".