Is 9 a Fibonacci Number?

9 is a Fibonacci Number if it is in the Fibonacci Sequence.

The Fibonacci Sequence starts with 1, 1, followed by the sum of the last two numbers in the sequence.

Looking at the Fibonacci Sequence, we found that 9 is not in the Fibonacci Sequence and 9 is therefore not a Fibonacci Number.

The closest Fibonacci Number below 9 is 8 and the closest Fibonacci Number above 9 is 13.

Fibonacci Numbers
Look up another number to see if it is a Fibonacci Number.

Is 10 a Fibonacci Number?
Now you know if 9 is a Fibonacci Number or not. Go here to see if the next number on our list is a Fibonacci Number.