13867209 has 12 divisors (see below), whose sum is σ = 20457216. Its totient is φ = 9047832.

The previous prime is 13867187. The next prime is 13867211. The reversal of 13867209 is 90276831.

13867209 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13867209 - 2¹⁵ = 13834441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13867279) 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, 15969 + ... + 16814.

It is an arithmetic number, because the mean of its divisors is an integer number (1704768).

Almost surely, 2^13867209 is an apocalyptic number.

It is an amenable number.

13867209 is a deficient number, since it is larger than the sum of its proper divisors (6590007).

13867209 is a wasteful number, since it uses less digits than its factorization.

13867209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32836 (or 32833 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 13867209 is about 3723.8701642243. The cubic root of 13867209 is about 240.2497920096.

The spelling of 13867209 in words is "thirteen million, eight hundred sixty-seven thousand, two hundred nine".