13706209 has 8 divisors (see below), whose sum is σ = 15037920. Its totient is φ = 12388800.

The previous prime is 13706167. The next prime is 13706213. The reversal of 13706209 is 90260731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13706209 - 2⁹ = 13705697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13706219) 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 7 ways as a sum of consecutive naturals, for example, 1512 + ... + 5449.

It is an arithmetic number, because the mean of its divisors is an integer number (1879740).

Almost surely, 2^13706209 is an apocalyptic number.

It is an amenable number.

13706209 is a deficient number, since it is larger than the sum of its proper divisors (1331711).

13706209 is a wasteful number, since it uses less digits than its factorization.

13706209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7151.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 13706209 is about 3702.1897574274. The cubic root of 13706209 is about 239.3163938132.

The spelling of 13706209 in words is "thirteen million, seven hundred six thousand, two hundred nine".