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170 is the smallest n for which φ(n) and σ(n) are both square (64 and 324 respectively). But 170 is never a solution for φ(x), making it a nontotient. Nor is it ever a solution to x - φ(x), making it a noncototient.
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I don't know if anything I posted just now is even remotely true either.
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Apophis is closest to earth on 2029 April the 13th (a friday) lol
***this post is purely spiritual, speculative, apolitical and nonpartisan in nature.