13981339 has 2 divisors, whose sum is σ = 13981340. Its totient is φ = 13981338.

The previous prime is 13981337. The next prime is 13981349. The reversal of 13981339 is 93318931.

It is a weak prime.

It is an emirp because it is prime and its reverse (93318931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13981339 - 2¹ = 13981337 is a prime.

Together with 13981337, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13981298 and 13981307.

It is not a weakly prime, because it can be changed into another prime (13981333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6990669 + 6990670.

It is an arithmetic number, because the mean of its divisors is an integer number (6990670).

Almost surely, 2^13981339 is an apocalyptic number.

13981339 is a deficient number, since it is larger than the sum of its proper divisors (1).

13981339 is an equidigital number, since it uses as much as digits as its factorization.

13981339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 13981339 is about 3739.1628742273. The cubic root of 13981339 is about 240.9070938872.

The spelling of 13981339 in words is "thirteen million, nine hundred eighty-one thousand, three hundred thirty-nine".