9000 is an interestingly weird number to say the least...
9000 benches are in New York City's Central Park which would stretch 7 miles if placed end to end.
9000 is the average number of peas everyone in Britain eats per year.
9000 years old, the Kennewick Man’s remains, discovered nearly 20 years ago along the banks of the Columbia River in Washington State, comprise one of the most complete ancient skeletons ever found.
9000 years ago humans started to tame and herd goats.
9000 is the average number of taste buds on a human tongue and they get regenerated every 2 weeks.
9000 mosquito bites per person, per minute was recorded in the interest of science when Arctic researchers uncovered their chests, arms, and legs. At that rate, an unprotected human would lose one half of his or her blood supply in approximately 2 hours.
I also think 9000 was the number the Beatles were referring to here...
… And though the holes were rather small...They had to count them all...
Now they know how many holes it takes to fill the Albert Hall