This number is a prime.

+ The start of a curious sequence of circular-digit primes, i.e., 6089, 60899, 608999, 6089999, 60899999, 608999999. [Earls]

+ The first occurrence of a twin prime pair (6089, 6091) that both consist of a nonprime number of nonprime digits only. Note that the larger member is an invertible prime which turned upside down corresponds also to the larger member (1609) of a twin prime pair. [Beedassy]

+ The smallest circular-digit prime that contains all circular digits. [Loungrides]

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

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