561167617 has 2 divisors, whose sum is σ = 561167618. Its totient is φ = 561167616.

The previous prime is 561167597. The next prime is 561167653. The reversal of 561167617 is 716761165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289544256 + 271623361 = 17016^2 + 16481^2 .

It is a cyclic number.

It is not a de Polignac number, because 561167617 - 2²³ = 552779009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561167617.

It is not a weakly prime, because it can be changed into another prime (561167687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280583808 + 280583809.

It is an arithmetic number, because the mean of its divisors is an integer number (280583809).

Almost surely, 2^561167617 is an apocalyptic number.

It is an amenable number.

561167617 is a deficient number, since it is larger than the sum of its proper divisors (1).

561167617 is an equidigital number, since it uses as much as digits as its factorization.

561167617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 40.

The square root of 561167617 is about 23688.9766980340. The cubic root of 561167617 is about 824.8295292713.

The spelling of 561167617 in words is "five hundred sixty-one million, one hundred sixty-seven thousand, six hundred seventeen".