13878907 has 12 divisors (see below), whose sum is σ = 16703280. Its totient is φ = 11484816.

The previous prime is 13878883. The next prime is 13878923. The reversal of 13878907 is 70987831.

13878907 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13878907 - 2⁷ = 13878779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13878937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3463 + ... + 6304.

It is an arithmetic number, because the mean of its divisors is an integer number (1391940).

Almost surely, 2^13878907 is an apocalyptic number.

13878907 is a deficient number, since it is larger than the sum of its proper divisors (2824373).

13878907 is an equidigital number, since it uses as much as digits as its factorization.

13878907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9810 (or 9803 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 13878907 is about 3725.4405108658. The cubic root of 13878907 is about 240.3173290837.

The spelling of 13878907 in words is "thirteen million, eight hundred seventy-eight thousand, nine hundred seven".