9899009 has 2 divisors, whose sum is σ = 9899010. Its totient is φ = 9899008.

The previous prime is 9899003. The next prime is 9899023. The reversal of 9899009 is 9009989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9628609 + 270400 = 3103^2 + 520^2 .

It is an emirp because it is prime and its reverse (9009989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9899009 - 2²⁰ = 8850433 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9899003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949504 + 4949505.

It is an arithmetic number, because the mean of its divisors is an integer number (4949505).

Almost surely, 2^9899009 is an apocalyptic number.

It is an amenable number.

9899009 is a deficient number, since it is larger than the sum of its proper divisors (1).

9899009 is an equidigital number, since it uses as much as digits as its factorization.

9899009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 44.

The square root of 9899009 is about 3146.2690603316. The cubic root of 9899009 is about 214.7157520025.

The spelling of 9899009 in words is "nine million, eight hundred ninety-nine thousand, nine".