17 (seventeen) is a positive integer following 16 and preceding 18. Its ordinal form is written "17th" or "seventeenth".

Properties Edit

17 is odd prime number. It is a Fermat prime \(2^{2^2}+1\).

17 is associated with bad luck in Italian superstition.

In googology Edit

In Greek-based naming systems, 17 is associated with prefix "heptadeka-", and with prefix "septendeci-" in Latin systems.

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