13933809 has 24 divisors (see below), whose sum is σ = 21227360. Its totient is φ = 9033120.

The previous prime is 13933771. The next prime is 13933811. The reversal of 13933809 is 90833931.

It is not a de Polignac number, because 13933809 - 2¹¹ = 13931761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13933819) 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 23 ways as a sum of consecutive naturals, for example, 45234 + ... + 45540.

Almost surely, 2^13933809 is an apocalyptic number.

It is an amenable number.

13933809 is a deficient number, since it is larger than the sum of its proper divisors (7293551).

13933809 is an equidigital number, since it uses as much as digits as its factorization.

13933809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 351 counting only the distinct ones).

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

The square root of 13933809 is about 3732.8017627514. The cubic root of 13933809 is about 240.6337935506.

The spelling of 13933809 in words is "thirteen million, nine hundred thirty-three thousand, eight hundred nine".