This number is a prime.

+ 1000000007 and 1000000009 are the largest known pair of twin primes of the form [10^n + 7, 10^n + 9].

+ The smallest emirp of the form 10^n + n (n=9). [Loungrides]

+ The larger member of the first twimirp greater than a billion. [Green]

(There are 4 curios for this number that have not yet been approved by an editor.)

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