561075817 has 2 divisors, whose sum is σ = 561075818. Its totient is φ = 561075816.

The previous prime is 561075799. The next prime is 561075887. The reversal of 561075817 is 718570165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403045776 + 158030041 = 20076^2 + 12571^2 .

It is a cyclic number.

It is not a de Polignac number, because 561075817 - 2⁷ = 561075689 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561075817.

It is not a weakly prime, because it can be changed into another prime (561075887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280537908 + 280537909.

It is an arithmetic number, because the mean of its divisors is an integer number (280537909).

Almost surely, 2^561075817 is an apocalyptic number.

It is an amenable number.

561075817 is a deficient number, since it is larger than the sum of its proper divisors (1).

561075817 is an equidigital number, since it uses as much as digits as its factorization.

561075817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 561075817 is about 23687.0390087069. The cubic root of 561075817 is about 824.7845495553.

The spelling of 561075817 in words is "five hundred sixty-one million, seventy-five thousand, eight hundred seventeen".