561728417 has 2 divisors, whose sum is σ = 561728418. Its totient is φ = 561728416.

The previous prime is 561728383. The next prime is 561728441. The reversal of 561728417 is 714827165.

561728417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 503374096 + 58354321 = 22436^2 + 7639^2 .

It is a cyclic number.

It is not a de Polignac number, because 561728417 - 2¹⁰ = 561727393 is a prime.

It is not a weakly prime, because it can be changed into another prime (561728317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280864208 + 280864209.

It is an arithmetic number, because the mean of its divisors is an integer number (280864209).

Almost surely, 2^561728417 is an apocalyptic number.

It is an amenable number.

561728417 is a deficient number, since it is larger than the sum of its proper divisors (1).

561728417 is an equidigital number, since it uses as much as digits as its factorization.

561728417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 41.

The square root of 561728417 is about 23700.8104713742. The cubic root of 561728417 is about 825.1042008574.

The spelling of 561728417 in words is "five hundred sixty-one million, seven hundred twenty-eight thousand, four hundred seventeen".