13881717 has 12 divisors (see below), whose sum is σ = 20084064. Its totient is φ = 9239400.

The previous prime is 13881713. The next prime is 13881737. The reversal of 13881717 is 71718831.

It is not a de Polignac number, because 13881717 - 2² = 13881713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13881713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8842 + ... + 10292.

It is an arithmetic number, because the mean of its divisors is an integer number (1673672).

Almost surely, 2^13881717 is an apocalyptic number.

It is an amenable number.

13881717 is a deficient number, since it is larger than the sum of its proper divisors (6202347).

13881717 is a wasteful number, since it uses less digits than its factorization.

13881717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2520 (or 2517 counting only the distinct ones).

The product of its digits is 9408, while the sum is 36.

The square root of 13881717 is about 3725.8176283871. The cubic root of 13881717 is about 240.3335466462. Note that the first 3 decimals are identical.

The spelling of 13881717 in words is "thirteen million, eight hundred eighty-one thousand, seven hundred seventeen".