617868689717 has 2 divisors, whose sum is σ = 617868689718. Its totient is φ = 617868689716.

The previous prime is 617868689689. The next prime is 617868689741. The reversal of 617868689717 is 717986868716.

617868689717 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., 515766712561 + 102101977156 = 718169^2 + 319534^2 .

It is a cyclic number.

It is not a de Polignac number, because 617868689717 - 2⁶ = 617868689653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617868689747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308934344858 + 308934344859.

It is an arithmetic number, because the mean of its divisors is an integer number (308934344859).

Almost surely, 2^617868689717 is an apocalyptic number.

It is an amenable number.

617868689717 is a deficient number, since it is larger than the sum of its proper divisors (1).

617868689717 is an equidigital number, since it uses as much as digits as its factorization.

617868689717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 341397504, while the sum is 74.

The spelling of 617868689717 in words is "six hundred seventeen billion, eight hundred sixty-eight million, six hundred eighty-nine thousand, seven hundred seventeen".