13809839 has 8 divisors (see below), whose sum is σ = 14284080. Its totient is φ = 13343616.

The previous prime is 13809823. The next prime is 13809841. The reversal of 13809839 is 93890831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13809839 - 2⁴ = 13809823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13809796 and 13809805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1607 + ... + 5495.

It is an arithmetic number, because the mean of its divisors is an integer number (1785510).

Almost surely, 2^13809839 is an apocalyptic number.

13809839 is a deficient number, since it is larger than the sum of its proper divisors (474241).

13809839 is an equidigital number, since it uses as much as digits as its factorization.

13809839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 13809839 is about 3716.1591731249. The cubic root of 13809839 is about 239.9180217699.

The spelling of 13809839 in words is "thirteen million, eight hundred nine thousand, eight hundred thirty-nine".