13309997108917 has 2 divisors, whose sum is σ = 13309997108918. Its totient is φ = 13309997108916.

The previous prime is 13309997108911. The next prime is 13309997108957. The reversal of 13309997108917 is 71980179990331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12172939572676 + 1137057536241 = 3488974^2 + 1066329^2 .

It is an emirp because it is prime and its reverse (71980179990331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13309997108917 - 2³ = 13309997108909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13309997108911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6654998554458 + 6654998554459.

It is an arithmetic number, because the mean of its divisors is an integer number (6654998554459).

Almost surely, 2^{13309997108917} is an apocalyptic number.

It is an amenable number.

13309997108917 is a deficient number, since it is larger than the sum of its proper divisors (1).

13309997108917 is an equidigital number, since it uses as much as digits as its factorization.

13309997108917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23147208, while the sum is 67.

The spelling of 13309997108917 in words is "thirteen trillion, three hundred nine billion, nine hundred ninety-seven million, one hundred eight thousand, nine hundred seventeen".