11686009 has 2 divisors, whose sum is σ = 11686010. Its totient is φ = 11686008.

The previous prime is 11685991. The next prime is 11686013. The reversal of 11686009 is 90068611.

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., 9734400 + 1951609 = 3120^2 + 1397^2 .

It is a cyclic number.

It is not a de Polignac number, because 11686009 - 2⁹ = 11685497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11686019) 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 as a sum of consecutive naturals, namely, 5843004 + 5843005.

It is an arithmetic number, because the mean of its divisors is an integer number (5843005).

Almost surely, 2^11686009 is an apocalyptic number.

It is an amenable number.

11686009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11686009 is an equidigital number, since it uses as much as digits as its factorization.

11686009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 11686009 is about 3418.4805104022. The cubic root of 11686009 is about 226.9283413447.

The spelling of 11686009 in words is "eleven million, six hundred eighty-six thousand, nine".