13831909 has 16 divisors (see below), whose sum is σ = 17210368. Its totient is φ = 10824192.

The previous prime is 13831903. The next prime is 13831919. The reversal of 13831909 is 90913831.

It is a cyclic number.

It is not a de Polignac number, because 13831909 - 2⁹ = 13831397 is a prime.

It is a super-3 number, since 3×13831909³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13831903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8044 + ... + 9610.

It is an arithmetic number, because the mean of its divisors is an integer number (1075648).

Almost surely, 2^13831909 is an apocalyptic number.

It is an amenable number.

13831909 is a deficient number, since it is larger than the sum of its proper divisors (3378459).

13831909 is a wasteful number, since it uses less digits than its factorization.

13831909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 13831909 is about 3719.1274514327. The cubic root of 13831909 is about 240.0457609501.

The spelling of 13831909 in words is "thirteen million, eight hundred thirty-one thousand, nine hundred nine".