13116209 has 4 divisors (see below), whose sum is σ = 13127460. Its totient is φ = 13104960.

The previous prime is 13116203. The next prime is 13116217. The reversal of 13116209 is 90261131.

It is a happy number.

13116209 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7840000 + 5276209 = 2800^2 + 2297^2 .

It is a cyclic number.

It is not a de Polignac number, because 13116209 - 2¹⁶ = 13050673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13116203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3644 + ... + 6285.

It is an arithmetic number, because the mean of its divisors is an integer number (3281865).

Almost surely, 2^13116209 is an apocalyptic number.

It is an amenable number.

13116209 is a deficient number, since it is larger than the sum of its proper divisors (11251).

13116209 is an equidigital number, since it uses as much as digits as its factorization.

13116209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11250.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 13116209 is about 3621.6307100531. The cubic root of 13116209 is about 235.8320228118.

The spelling of 13116209 in words is "thirteen million, one hundred sixteen thousand, two hundred nine".