13398939 has 20 divisors (see below), whose sum is σ = 20267016. Its totient is φ = 8820576.

The previous prime is 13398937. The next prime is 13398943. The reversal of 13398939 is 93989331.

It is not a de Polignac number, because 13398939 - 2¹ = 13398937 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13398894 and 13398903.

It is not an unprimeable number, because it can be changed into a prime (13398937) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5727 + ... + 7719.

Almost surely, 2^13398939 is an apocalyptic number.

13398939 is a deficient number, since it is larger than the sum of its proper divisors (6868077).

13398939 is an equidigital number, since it uses as much as digits as its factorization.

13398939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088 (or 2079 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 13398939 is about 3660.4561191196. The cubic root of 13398939 is about 237.5145047466.

The spelling of 13398939 in words is "thirteen million, three hundred ninety-eight thousand, nine hundred thirty-nine".