Is 243 a Fibonacci Number?

243 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 243 is not in the Fibonacci Sequence and 243 is therefore not a Fibonacci Number.

The closest Fibonacci Number below 243 is 233 and the closest Fibonacci Number above 243 is 377.

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

Is 244 a Fibonacci Number?
Now you know if 243 is a Fibonacci Number or not. Go here to see if the next number on our list is a Fibonacci Number.