12811717 has 2 divisors, whose sum is σ = 12811718. Its totient is φ = 12811716.

The previous prime is 12811703. The next prime is 12811741. The reversal of 12811717 is 71711821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 763876 = 3471^2 + 874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12811717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12811787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6405858 + 6405859.

It is an arithmetic number, because the mean of its divisors is an integer number (6405859).

Almost surely, 2^12811717 is an apocalyptic number.

It is an amenable number.

12811717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12811717 is an equidigital number, since it uses as much as digits as its factorization.

12811717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 784, while the sum is 28.

The square root of 12811717 is about 3579.3458899637. The cubic root of 12811717 is about 233.9927737803.

The spelling of 12811717 in words is "twelve million, eight hundred eleven thousand, seven hundred seventeen".