13887399 has 8 divisors (see below), whose sum is σ = 18700272. Its totient is φ = 9166400.

The previous prime is 13887389. The next prime is 13887403. The reversal of 13887399 is 99378831.

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 13887399 - 2¹³ = 13879207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887329) 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, 22614 + ... + 23219.

It is an arithmetic number, because the mean of its divisors is an integer number (2337534).

Almost surely, 2^13887399 is an apocalyptic number.

13887399 is a deficient number, since it is larger than the sum of its proper divisors (4812873).

13887399 is a wasteful number, since it uses less digits than its factorization.

13887399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45937.

The product of its digits is 326592, while the sum is 48.

The square root of 13887399 is about 3726.5800675687. The cubic root of 13887399 is about 240.3663329108.

The spelling of 13887399 in words is "thirteen million, eight hundred eighty-seven thousand, three hundred ninety-nine".