561417217 has 2 divisors, whose sum is σ = 561417218. Its totient is φ = 561417216.

The previous prime is 561417179. The next prime is 561417239. The reversal of 561417217 is 712714165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500014321 + 61402896 = 22361^2 + 7836^2 .

It is a cyclic number.

It is not a de Polignac number, because 561417217 - 2¹⁵ = 561384449 is a prime.

It is a super-3 number, since 3×561417217³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (561417277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280708608 + 280708609.

It is an arithmetic number, because the mean of its divisors is an integer number (280708609).

Almost surely, 2^561417217 is an apocalyptic number.

It is an amenable number.

561417217 is a deficient number, since it is larger than the sum of its proper divisors (1).

561417217 is an equidigital number, since it uses as much as digits as its factorization.

561417217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 34.

The square root of 561417217 is about 23694.2443855043. The cubic root of 561417217 is about 824.9518022654.

The spelling of 561417217 in words is "five hundred sixty-one million, four hundred seventeen thousand, two hundred seventeen".