This number is a composite.

                                                               79 8006269373

+ J. K. Andersen found that 798006269373 is the largest known integer N such that the reverse of N is equal to the sum of the reversal of the proper divisors of N. The proper divisors of 798006269373 are 1, 3, 19, 57, 14000109989, 42000329967, 266002089791 and the sum of the reversals is equal to 373962600897. [Rivera]

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