13899839 has 2 divisors, whose sum is σ = 13899840. Its totient is φ = 13899838.

The previous prime is 13899803. The next prime is 13899877. The reversal of 13899839 is 93899831.

13899839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13899839 - 2¹² = 13895743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13899239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6949919 + 6949920.

It is an arithmetic number, because the mean of its divisors is an integer number (6949920).

Almost surely, 2^13899839 is an apocalyptic number.

13899839 is a deficient number, since it is larger than the sum of its proper divisors (1).

13899839 is an equidigital number, since it uses as much as digits as its factorization.

13899839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 50.

The square root of 13899839 is about 3728.2487846172. The cubic root of 13899839 is about 240.4380829625.

The spelling of 13899839 in words is "thirteen million, eight hundred ninety-nine thousand, eight hundred thirty-nine".