This number is a composite.
3^192 + 192 - 2 is prime and contains a sum of digits equal to 19^2. [Patterson]
The smallest happy number sandwiched between a twin prime pair. [Gupta]
The only 3-digit compositorial number n, (192 = 4*6*8),
such that (n-1, n+1) is a twin prime pair, i.e., (191,
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