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Natural number
369 (three hundred [and] sixty-nine) is the natural number following 368 and preceding 370.
369 is the magic constant of the 9 × 9 magic square[1][2] and the n-Queens Problem for n = 9.[2]
There are 369 free octominoes (polyominoes of order 8).[3][4]
369 is a Ruth-Aaron Pair with 370. The sums of their prime factors are equivalent.[5]
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