9916009 has 2 divisors, whose sum is σ = 9916010. Its totient is φ = 9916008.

The previous prime is 9916003. The next prime is 9916021. The reversal of 9916009 is 9006199.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5076009 + 4840000 = 2253^2 + 2200^2 .

It is an emirp because it is prime and its reverse (9006199) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9916009 - 2⁷ = 9915881 is a prime.

It is not a weakly prime, because it can be changed into another prime (9916003) 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, 4958004 + 4958005.

It is an arithmetic number, because the mean of its divisors is an integer number (4958005).

Almost surely, 2^9916009 is an apocalyptic number.

It is an amenable number.

9916009 is a deficient number, since it is larger than the sum of its proper divisors (1).

9916009 is an equidigital number, since it uses as much as digits as its factorization.

9916009 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 34.

The square root of 9916009 is about 3148.9695139839. The cubic root of 9916009 is about 214.8385952839.

The spelling of 9916009 in words is "nine million, nine hundred sixteen thousand, nine".