13938717 has 16 divisors (see below), whose sum is σ = 20111168. Its totient is φ = 8536320.

The previous prime is 13938697. The next prime is 13938731. The reversal of 13938717 is 71783931.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-13938717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13938797) 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 in 15 ways as a sum of consecutive naturals, for example, 8658 + ... + 10140.

It is an arithmetic number, because the mean of its divisors is an integer number (1256948).

Almost surely, 2^13938717 is an apocalyptic number.

It is an amenable number.

13938717 is a deficient number, since it is larger than the sum of its proper divisors (6172451).

13938717 is a wasteful number, since it uses less digits than its factorization.

13938717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740.

The product of its digits is 31752, while the sum is 39.

The square root of 13938717 is about 3733.4591199048. The cubic root of 13938717 is about 240.6620435914.

The spelling of 13938717 in words is "thirteen million, nine hundred thirty-eight thousand, seven hundred seventeen".