717983380817 has 2 divisors, whose sum is σ = 717983380818. Its totient is φ = 717983380816.

The previous prime is 717983380801. The next prime is 717983380819. The reversal of 717983380817 is 718083389717.

It is a happy number.

717983380817 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., 362375104576 + 355608276241 = 601976^2 + 596329^2 .

It is an emirp because it is prime and its reverse (718083389717) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 717983380817 - 2⁴ = 717983380801 is a prime.

Together with 717983380819, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 717983380817.

It is not a weakly prime, because it can be changed into another prime (717983380819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358991690408 + 358991690409.

It is an arithmetic number, because the mean of its divisors is an integer number (358991690409).

Almost surely, 2^717983380817 is an apocalyptic number.

It is an amenable number.

717983380817 is a deficient number, since it is larger than the sum of its proper divisors (1).

717983380817 is an equidigital number, since it uses as much as digits as its factorization.

717983380817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14224896, while the sum is 62.

The spelling of 717983380817 in words is "seven hundred seventeen billion, nine hundred eighty-three million, three hundred eighty thousand, eight hundred seventeen".