13686009 has 4 divisors (see below), whose sum is σ = 18248016. Its totient is φ = 9124004.

The previous prime is 13686007. The next prime is 13686017. The reversal of 13686009 is 90068631.

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.

It is a cyclic number.

It is not a de Polignac number, because 13686009 - 2¹ = 13686007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13686007) 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 3 ways as a sum of consecutive naturals, for example, 2280999 + ... + 2281004.

It is an arithmetic number, because the mean of its divisors is an integer number (4562004).

Almost surely, 2^13686009 is an apocalyptic number.

It is an amenable number.

13686009 is a deficient number, since it is larger than the sum of its proper divisors (4562007).

13686009 is an equidigital number, since it uses as much as digits as its factorization.

13686009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4562006.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 13686009 is about 3699.4606363631. The cubic root of 13686009 is about 239.1987690697.

The spelling of 13686009 in words is "thirteen million, six hundred eighty-six thousand, nine".