13851317 has 4 divisors (see below), whose sum is σ = 14189196. Its totient is φ = 13513440.

The previous prime is 13851293. The next prime is 13851329. The reversal of 13851317 is 71315831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 790321 + 13060996 = 889^2 + 3614^2 .

It is a cyclic number.

It is not a de Polignac number, because 13851317 - 2¹⁶ = 13785781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13851317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13851347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168878 + ... + 168959.

It is an arithmetic number, because the mean of its divisors is an integer number (3547299).

Almost surely, 2^13851317 is an apocalyptic number.

It is an amenable number.

13851317 is a deficient number, since it is larger than the sum of its proper divisors (337879).

13851317 is an equidigital number, since it uses as much as digits as its factorization.

13851317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337878.

The product of its digits is 2520, while the sum is 29.

The square root of 13851317 is about 3721.7357509635. The cubic root of 13851317 is about 240.1579804770.

The spelling of 13851317 in words is "thirteen million, eight hundred fifty-one thousand, three hundred seventeen".