13931717 has 2 divisors, whose sum is σ = 13931718. Its totient is φ = 13931716.

The previous prime is 13931711. The next prime is 13931737. The reversal of 13931717 is 71713931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13293316 + 638401 = 3646^2 + 799^2 .

It is a cyclic number.

It is not a de Polignac number, because 13931717 - 2⁸ = 13931461 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13931711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6965858 + 6965859.

It is an arithmetic number, because the mean of its divisors is an integer number (6965859).

Almost surely, 2^13931717 is an apocalyptic number.

It is an amenable number.

13931717 is a deficient number, since it is larger than the sum of its proper divisors (1).

13931717 is an equidigital number, since it uses as much as digits as its factorization.

13931717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3969, while the sum is 32.

The square root of 13931717 is about 3732.5215337624. The cubic root of 13931717 is about 240.6217501557.

The spelling of 13931717 in words is "thirteen million, nine hundred thirty-one thousand, seven hundred seventeen".