9911009 has 2 divisors, whose sum is σ = 9911010. Its totient is φ = 9911008.

The previous prime is 9910993. The next prime is 9911023. The reversal of 9911009 is 9001199.

9911009 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9150625 + 760384 = 3025^2 + 872^2 .

It is an emirp because it is prime and its reverse (9001199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9911009 - 2⁴ = 9910993 is a prime.

It is not a weakly prime, because it can be changed into another prime (9911309) 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, 4955504 + 4955505.

It is an arithmetic number, because the mean of its divisors is an integer number (4955505).

Almost surely, 2^9911009 is an apocalyptic number.

It is an amenable number.

9911009 is a deficient number, since it is larger than the sum of its proper divisors (1).

9911009 is an equidigital number, since it uses as much as digits as its factorization.

9911009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 9911009 is about 3148.1755033670. The cubic root of 9911009 is about 214.8024794913.

The spelling of 9911009 in words is "nine million, nine hundred eleven thousand, nine".