13833909 has 20 divisors (see below), whose sum is σ = 20782476. Its totient is φ = 9170496.

The previous prime is 13833887. The next prime is 13833913. The reversal of 13833909 is 90933831.

It can be written as a sum of positive squares in 2 ways, for example, as 9090225 + 4743684 = 3015^2 + 2178^2 .

It is not a de Polignac number, because 13833909 - 2⁵ = 13833877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13833949) 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 19 ways as a sum of consecutive naturals, for example, 18507 + ... + 19239.

Almost surely, 2^13833909 is an apocalyptic number.

It is an amenable number.

13833909 is a deficient number, since it is larger than the sum of its proper divisors (6948567).

13833909 is an equidigital number, since it uses as much as digits as its factorization.

13833909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 13833909 is about 3719.3963219856. The cubic root of 13833909 is about 240.0573300542.

The spelling of 13833909 in words is "thirteen million, eight hundred thirty-three thousand, nine hundred nine".