13731839 has 4 divisors (see below), whose sum is σ = 14980200. Its totient is φ = 12483480.

The previous prime is 13731829. The next prime is 13731863. The reversal of 13731839 is 93813731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13731839 - 2²⁰ = 12683263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13731799 and 13731808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13731829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624164 + ... + 624185.

It is an arithmetic number, because the mean of its divisors is an integer number (3745050).

Almost surely, 2^13731839 is an apocalyptic number.

13731839 is a deficient number, since it is larger than the sum of its proper divisors (1248361).

13731839 is a wasteful number, since it uses less digits than its factorization.

13731839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248360.

The product of its digits is 13608, while the sum is 35.

The square root of 13731839 is about 3705.6496056697. The cubic root of 13731839 is about 239.4654712594.

The spelling of 13731839 in words is "thirteen million, seven hundred thirty-one thousand, eight hundred thirty-nine".