13831939 has 8 divisors (see below), whose sum is σ = 15440832. Its totient is φ = 12281640.

The previous prime is 13831919. The next prime is 13831957. The reversal of 13831939 is 93913831.

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 13831939 - 2⁹ = 13831427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13831898 and 13831907.

It is not an unprimeable number, because it can be changed into a prime (13831919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14149 + ... + 15094.

It is an arithmetic number, because the mean of its divisors is an integer number (1930104).

Almost surely, 2^13831939 is an apocalyptic number.

13831939 is a deficient number, since it is larger than the sum of its proper divisors (1608893).

13831939 is a wasteful number, since it uses less digits than its factorization.

13831939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29297.

The product of its digits is 17496, while the sum is 37.

The square root of 13831939 is about 3719.1314846346. The cubic root of 13831939 is about 240.0459344949.

The spelling of 13831939 in words is "thirteen million, eight hundred thirty-one thousand, nine hundred thirty-nine".