11684209 has 2 divisors, whose sum is σ = 11684210. Its totient is φ = 11684208.

The previous prime is 11684203. The next prime is 11684213. The reversal of 11684209 is 90248611.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10909809 + 774400 = 3303^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 11684209 - 2⁵ = 11684177 is a prime.

It is not a weakly prime, because it can be changed into another prime (11684203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5842104 + 5842105.

It is an arithmetic number, because the mean of its divisors is an integer number (5842105).

Almost surely, 2^11684209 is an apocalyptic number.

It is an amenable number.

11684209 is a deficient number, since it is larger than the sum of its proper divisors (1).

11684209 is an equidigital number, since it uses as much as digits as its factorization.

11684209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 11684209 is about 3418.2172253969. The cubic root of 11684209 is about 226.9166894629.

The spelling of 11684209 in words is "eleven million, six hundred eighty-four thousand, two hundred nine".