13798639 has 2 divisors, whose sum is σ = 13798640. Its totient is φ = 13798638.

The previous prime is 13798621. The next prime is 13798651. The reversal of 13798639 is 93689731.

It is a strong prime.

It is an emirp because it is prime and its reverse (93689731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13798639 - 2⁵ = 13798607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13798699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6899319 + 6899320.

It is an arithmetic number, because the mean of its divisors is an integer number (6899320).

Almost surely, 2^13798639 is an apocalyptic number.

13798639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13798639 is an equidigital number, since it uses as much as digits as its factorization.

13798639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 13798639 is about 3714.6519352424. The cubic root of 13798639 is about 239.8531451122.

The spelling of 13798639 in words is "thirteen million, seven hundred ninety-eight thousand, six hundred thirty-nine".