13881317 has 2 divisors, whose sum is σ = 13881318. Its totient is φ = 13881316.

The previous prime is 13881311. The next prime is 13881319. The reversal of 13881317 is 71318831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11062276 + 2819041 = 3326^2 + 1679^2 .

It is a cyclic number.

It is not a de Polignac number, because 13881317 - 2¹⁸ = 13619173 is a prime.

Together with 13881319, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₉₀₂₈₉₄ and since 13881317 and 902894 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13881311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6940658 + 6940659.

It is an arithmetic number, because the mean of its divisors is an integer number (6940659).

Almost surely, 2^13881317 is an apocalyptic number.

It is an amenable number.

13881317 is a deficient number, since it is larger than the sum of its proper divisors (1).

13881317 is an equidigital number, since it uses as much as digits as its factorization.

13881317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 13881317 is about 3725.7639485077. The cubic root of 13881317 is about 240.3312382300.

The spelling of 13881317 in words is "thirteen million, eight hundred eighty-one thousand, three hundred seventeen".