561717647 has 2 divisors, whose sum is σ = 561717648. Its totient is φ = 561717646.

The previous prime is 561717581. The next prime is 561717677. The reversal of 561717647 is 746717165.

It is a happy number.

561717647 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 is a cyclic number.

It is not a de Polignac number, because 561717647 - 2²⁶ = 494608783 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 561717598 and 561717607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561717677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280858823 + 280858824.

It is an arithmetic number, because the mean of its divisors is an integer number (280858824).

Almost surely, 2^561717647 is an apocalyptic number.

561717647 is a deficient number, since it is larger than the sum of its proper divisors (1).

561717647 is an equidigital number, since it uses as much as digits as its factorization.

561717647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 44.

The square root of 561717647 is about 23700.5832628651. The cubic root of 561717647 is about 825.0989275921.

The spelling of 561717647 in words is "five hundred sixty-one million, seven hundred seventeen thousand, six hundred forty-seven".