Why is 13 a cool number?
Approved answer
Why is 13 a Cool Number?
The number 13 holds several interesting properties: it is classified as a prime number, a happy number, and is often considered a lucky number. Additionally, it is a twin prime in relation to 11 and a cousin prime alongside 17. Among its unique traits, 13 is noted as the second of the three known Wilson primes. If you're interested in geometry, you'll find that a regular polygon with 13 sides is referred to as a tridecagon.