561016117 has 2 divisors, whose sum is σ = 561016118. Its totient is φ = 561016116.

The previous prime is 561016103. The next prime is 561016123. The reversal of 561016117 is 711610165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505080676 + 55935441 = 22474^2 + 7479^2 .

It is a cyclic number.

It is not a de Polignac number, because 561016117 - 2⁷ = 561015989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561016187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280508058 + 280508059.

It is an arithmetic number, because the mean of its divisors is an integer number (280508059).

Almost surely, 2^561016117 is an apocalyptic number.

It is an amenable number.

561016117 is a deficient number, since it is larger than the sum of its proper divisors (1).

561016117 is an equidigital number, since it uses as much as digits as its factorization.

561016117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 561016117 is about 23685.7787923471. The cubic root of 561016117 is about 824.7552954078.

The spelling of 561016117 in words is "five hundred sixty-one million, sixteen thousand, one hundred seventeen".