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If you know a distinctive fact about a number not listed here, please e-mail me. primes graphs digits sums of powers bases combinatorics powers/polygonal Fibonacci geometry repdigits algebra perfect/amicable pandigital matrices divisors games/puzzles 0 is the additive identity. 1 is the multiplicative identity. 2 is the only even prime. 3 is the number of spatial dimensions we live in. 4 is the sm
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