437

This number is a composite.

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+ The smallest tetranacci brilliant number (437 = 19 × 23) defined by the four prime digits (T0=2, T1=3, T2=5, T3=7) and the recurrence relation: Tn = Tn-1 + Tn-2 + Tn-3 + Tn-4. [Loungrides]

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