13887915 has 16 divisors (see below), whose sum is σ = 22291200. Its totient is φ = 7383392.

The previous prime is 13887911. The next prime is 13887919. The reversal of 13887915 is 51978831.

It is an interprime number because it is at equal distance from previous prime (13887911) and next prime (13887919).

It is a cyclic number.

It is not a de Polignac number, because 13887915 - 2² = 13887911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13887911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4096 + ... + 6674.

It is an arithmetic number, because the mean of its divisors is an integer number (1393200).

Almost surely, 2^13887915 is an apocalyptic number.

13887915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13887915 is a deficient number, since it is larger than the sum of its proper divisors (8403285).

13887915 is a wasteful number, since it uses less digits than its factorization.

13887915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946.

The product of its digits is 60480, while the sum is 42.

The square root of 13887915 is about 3726.6492993036. The cubic root of 13887915 is about 240.3693098899.

The spelling of 13887915 in words is "thirteen million, eight hundred eighty-seven thousand, nine hundred fifteen".