13878117 has 24 divisors (see below), whose sum is σ = 22097088. Its totient is φ = 8323200.

The previous prime is 13878101. The next prime is 13878119. The reversal of 13878117 is 71187831.

It is not a de Polignac number, because 13878117 - 2⁴ = 13878101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13878119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9517 + ... + 10877.

It is an arithmetic number, because the mean of its divisors is an integer number (920712).

Almost surely, 2^13878117 is an apocalyptic number.

It is an amenable number.

13878117 is a deficient number, since it is larger than the sum of its proper divisors (8218971).

13878117 is a wasteful number, since it uses less digits than its factorization.

13878117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 1478 counting only the distinct ones).

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

The square root of 13878117 is about 3725.3344816271. The cubic root of 13878117 is about 240.3127693036.

The spelling of 13878117 in words is "thirteen million, eight hundred seventy-eight thousand, one hundred seventeen".