13318209 has 16 divisors (see below), whose sum is σ = 19926400. Its totient is φ = 8790768.

The previous prime is 13318199. The next prime is 13318213. The reversal of 13318209 is 90281331.

It is not a de Polignac number, because 13318209 - 2⁵ = 13318177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13318009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387 + ... + 5175.

It is an arithmetic number, because the mean of its divisors is an integer number (1245400).

Almost surely, 2^13318209 is an apocalyptic number.

It is an amenable number.

13318209 is a deficient number, since it is larger than the sum of its proper divisors (6608191).

13318209 is a wasteful number, since it uses less digits than its factorization.

13318209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4901 (or 4895 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 13318209 is about 3649.4121444419. The cubic root of 13318209 is about 237.0365269770.

The spelling of 13318209 in words is "thirteen million, three hundred eighteen thousand, two hundred nine".