11984009 has 2 divisors, whose sum is σ = 11984010. Its totient is φ = 11984008.

The previous prime is 11983987. The next prime is 11984017. The reversal of 11984009 is 90048911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6390784 + 5593225 = 2528^2 + 2365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11984009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11984029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5992004 + 5992005.

It is an arithmetic number, because the mean of its divisors is an integer number (5992005).

Almost surely, 2^11984009 is an apocalyptic number.

It is an amenable number.

11984009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11984009 is an equidigital number, since it uses as much as digits as its factorization.

11984009 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 32.

The square root of 11984009 is about 3461.7927436518. The cubic root of 11984009 is about 228.8411081634.

The spelling of 11984009 in words is "eleven million, nine hundred eighty-four thousand, nine".