13867439 has 2 divisors, whose sum is σ = 13867440. Its totient is φ = 13867438.

The previous prime is 13867429. The next prime is 13867493. The reversal of 13867439 is 93476831.

Together with next prime (13867493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13867439 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 13867396 and 13867405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13867409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6933719 + 6933720.

It is an arithmetic number, because the mean of its divisors is an integer number (6933720).

Almost surely, 2^13867439 is an apocalyptic number.

13867439 is a deficient number, since it is larger than the sum of its proper divisors (1).

13867439 is an equidigital number, since it uses as much as digits as its factorization.

13867439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 13867439 is about 3723.9010459463. The cubic root of 13867439 is about 240.2511202544.

The spelling of 13867439 in words is "thirteen million, eight hundred sixty-seven thousand, four hundred thirty-nine".