13838931 has 10 divisors (see below), whose sum is σ = 20673092. Its totient is φ = 9225900.

The previous prime is 13838921. The next prime is 13838933. The reversal of 13838931 is 13983831.

13838931 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 13838931 - 2¹⁹ = 13314643 is a prime.

It is a super-2 number, since 2×13838931² = 383032022445522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13838933) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 85345 + ... + 85506.

Almost surely, 2^13838931 is an apocalyptic number.

13838931 is a deficient number, since it is larger than the sum of its proper divisors (6834161).

13838931 is an equidigital number, since it uses as much as digits as its factorization.

13838931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170863 (or 170854 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 13838931 is about 3720.0713702831. The cubic root of 13838931 is about 240.0863751602.

The spelling of 13838931 in words is "thirteen million, eight hundred thirty-eight thousand, nine hundred thirty-one".