13684009 has 4 divisors (see below), whose sum is σ = 14404240. Its totient is φ = 12963780.

The previous prime is 13684007. The next prime is 13684039. The reversal of 13684009 is 90048631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90048631 = 349 ⋅258019.

It is a cyclic number.

It is not a de Polignac number, because 13684009 - 2¹ = 13684007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13684001) 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 3 ways as a sum of consecutive naturals, for example, 360087 + ... + 360124.

It is an arithmetic number, because the mean of its divisors is an integer number (3601060).

Almost surely, 2^13684009 is an apocalyptic number.

13684009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13684009 is a deficient number, since it is larger than the sum of its proper divisors (720231).

13684009 is an equidigital number, since it uses as much as digits as its factorization.

13684009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720230.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 13684009 is about 3699.1903168126. The cubic root of 13684009 is about 239.1871167601.

The spelling of 13684009 in words is "thirteen million, six hundred eighty-four thousand, nine".