3333 - Three

OK, here's a lot of ways to do three...

Cardinal	three
Ordinal	3rd (third)
Numeral system	ternary
Factorization	prime
Divisors	1, 3
Roman numeral	III
Roman numeral (unicode)	Ⅲ, ⅲ
Greek prefix	tri-
Latin prefix	tre-/ter-
Binary	112
Ternary	103
Quaternary	34
Quinary	35
Senary	36
Octal	38
Duodecimal	312
Hexadecimal	316
Vigesimal	320
Base 36	336
Arabic	٣,3
Urdu
Bengali	৩
Chinese	三，弎，叁
Devanāgarī	३ (tin)
Ge'ez	፫
Greek	γ (or Γ)
Hebrew	ג
Japanese	三
Khmer	៣
Korean	셋,삼
Malayalam	൩
Tamil	௩
Telugu	౩
Thai	๓

And then there is the more exciting 'math' three...

3 is:

• a rough approximation of π (3.1415...) and a very rough approximation of e (2.71828..) when doing quick estimates.
• the first odd prime number,^[2] and the second smallest prime.
• the first Fermat prime (2²ⁿ + 1).
• the first Mersenne prime (2ⁿ − 1).
• the only number that is both a Fermat prime and a Mersenne prime.
• the first lucky prime.
• the first super-prime.
• the first unique prime due to the properties of its reciprocal.
• the second Sophie Germain prime.
• the second Mersenne prime exponent.
• the second factorial prime (2! + 1).
• the second Lucas prime.
• the second Stern prime.
• the second triangular number and it is the only prime triangular number.
• the third Heegner number.
• both the zeroth and third Perrin numbers in the Perrin sequence.
• the fourth Fibonacci number.
• the fourth open meandric number.
• the aliquot sum of 4.
• the smallest number of sides that a simple (non-self-intersecting) polygon can have.
• the only prime which is one less than a perfect square. Any other number which is n² − 1 for some integer n is not prime, since it is (n − 1)(n + 1). This is true for 3 as well (with n = 2), but in this case the smaller factor is 1. If n is greater than 2, both n − 1 and n + 1 are greater than 1 so their product is not prime.
• the number of non-collinear points needed to determine a plane and a circle.

All this info is from Wikipedia so all those links should work. As a Wednesday challenge try to visit all of them. Then go to the Wikipedia page on THREE and read much more with many more links. It's going to be a busy Wednesday for you.