9000099999

9000099999 is a large integer. Its prime factorization is 3 x 3 x 1111111111. The number 1111111111 is a repunit, meaning it consists of only the digit 1. Repunits are numbers of the form (10^n - 1) / 9. In this case, n = 10, so 1111111111 = (10^10 - 1) / 9. The primality of repunits is a subject of mathematical interest. 1111111111 is not a prime number. 9000099999 can be expressed as 9 * 10^9 + 9999. It can also be written as 9000000000 + 9999. This number has a total of 11 digits. It is a composite number.