717983118709 has 2 divisors, whose sum is σ = 717983118710. Its totient is φ = 717983118708.

The previous prime is 717983118563. The next prime is 717983118761. The reversal of 717983118709 is 907811389717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499880108484 + 218103010225 = 707022^2 + 467015^2 .

It is a cyclic number.

It is not a de Polignac number, because 717983118709 - 2⁹ = 717983118197 is a prime.

It is a super-2 number, since 2×717983118709² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (717983118509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358991559354 + 358991559355.

It is an arithmetic number, because the mean of its divisors is an integer number (358991559355).

Almost surely, 2^717983118709 is an apocalyptic number.

It is an amenable number.

717983118709 is a deficient number, since it is larger than the sum of its proper divisors (1).

717983118709 is an equidigital number, since it uses as much as digits as its factorization.

717983118709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5334336, while the sum is 61.

The spelling of 717983118709 in words is "seven hundred seventeen billion, nine hundred eighty-three million, one hundred eighteen thousand, seven hundred nine".