9000000 was a number.
In the 9th century, the Twelfth Doctor boasted to a party of Vikings that his sonic sunglasses were more advanced technology than humanity would manage over the next nine million years. (TV: The Girl Who Died)
According to Rose Noble in 2023, London had a population of nine million. (TV: The Star Beast [+]Loading...{"timestamp":"00:37:18","1":"The Star Beast (TV story)"})