13181317 has 2 divisors, whose sum is σ = 13181318. Its totient is φ = 13181316.

The previous prime is 13181309. The next prime is 13181347. The reversal of 13181317 is 71318131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12737761 + 443556 = 3569^2 + 666^2 .

It is a cyclic number.

It is not a de Polignac number, because 13181317 - 2³ = 13181309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13181291 and 13181300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13181347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6590658 + 6590659.

It is an arithmetic number, because the mean of its divisors is an integer number (6590659).

Almost surely, 2^13181317 is an apocalyptic number.

It is an amenable number.

13181317 is a deficient number, since it is larger than the sum of its proper divisors (1).

13181317 is an equidigital number, since it uses as much as digits as its factorization.

13181317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 13181317 is about 3630.6083512271. The cubic root of 13181317 is about 236.2215971379.

Adding to 13181317 its reverse (71318131), we get a palindrome (84499448).

The spelling of 13181317 in words is "thirteen million, one hundred eighty-one thousand, three hundred seventeen".