13391839 has 2 divisors, whose sum is σ = 13391840. Its totient is φ = 13391838.

The previous prime is 13391831. The next prime is 13391857. The reversal of 13391839 is 93819331.

It is a weak prime.

It is an emirp because it is prime and its reverse (93819331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13391839 - 2³ = 13391831 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13391798 and 13391807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13391831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6695919 + 6695920.

It is an arithmetic number, because the mean of its divisors is an integer number (6695920).

Almost surely, 2^13391839 is an apocalyptic number.

13391839 is a deficient number, since it is larger than the sum of its proper divisors (1).

13391839 is an equidigital number, since it uses as much as digits as its factorization.

13391839 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 13391839 is about 3659.4861661168. The cubic root of 13391839 is about 237.4725449334.

The spelling of 13391839 in words is "thirteen million, three hundred ninety-one thousand, eight hundred thirty-nine".