This number is a prime.

                                                     4 4917739914 6038697307

+ The second of three prime PPDI's in base 10. The sum of each of the 21 digits, when raised to the 21st power is equal to this same number. Note the other two prime PPDI's are 28116440335967 and 35452590104031691935943. [Heinz]

(There is one curio for this number that has not yet been approved by an editor.)

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