16018989989

This number is a prime.

                                                                1 6018989989

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The smallest invertible prime P containing all the invertible digits that is the sum of three consecutive squares: (73072^2 + 73073^2 + 73074^2). Curiously, P is also expressible as sum of two squares: (122465^2 + 31958^2). [Bajpai]