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Number 5 can be attributed to numerology, music, dates, religion and so much more. Here are ten intriguing facts all about this little number. The number 5 is classified as a prime number because its only factors are 1 and 5, meaning it cannot be evenly divided by any other positive integer. The number 5 is also recognized as an odd number since it cannot be divided evenly by the number 2. 5 is a Fermat prime, a Mersenne prime exponent, [1] as well as a Fibonacci number. 5 is the first congruent number, as well as the length of the hypotenuse of the smallest integer-sided right triangle, making part of the smallest Pythagorean triple (3, 4, 5 ). 5 ! means Laugh Out Loud (see also 120). This page explains how 5! is used in texting or on apps like TikTok or Instagram.
