13888717 has 8 divisors (see below), whose sum is σ = 14179320. Its totient is φ = 13601280.

The previous prime is 13888669. The next prime is 13888723. The reversal of 13888717 is 71788831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 206116 + 13682601 = 454^2 + 3699^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13888717 - 2¹¹ = 13886669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9367 + ... + 10747.

It is an arithmetic number, because the mean of its divisors is an integer number (1772415).

Almost surely, 2^13888717 is an apocalyptic number.

It is an amenable number.

13888717 is a deficient number, since it is larger than the sum of its proper divisors (290603).

13888717 is a wasteful number, since it uses less digits than its factorization.

13888717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583.

The product of its digits is 75264, while the sum is 43.

The square root of 13888717 is about 3726.7569011139. The cubic root of 13888717 is about 240.3739367538.

The spelling of 13888717 in words is "thirteen million, eight hundred eighty-eight thousand, seven hundred seventeen".