11996009 has 2 divisors, whose sum is σ = 11996010. Its totient is φ = 11996008.

The previous prime is 11996003. The next prime is 11996021. The reversal of 11996009 is 90069911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11833600 + 162409 = 3440^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 11996009 - 2¹² = 11991913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11996009.

It is not a weakly prime, because it can be changed into another prime (11996003) 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, 5998004 + 5998005.

It is an arithmetic number, because the mean of its divisors is an integer number (5998005).

Almost surely, 2^11996009 is an apocalyptic number.

It is an amenable number.

11996009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11996009 is an equidigital number, since it uses as much as digits as its factorization.

11996009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 11996009 is about 3463.5255160024. The cubic root of 11996009 is about 228.9174648378.

The spelling of 11996009 in words is "eleven million, nine hundred ninety-six thousand, nine".