This number is a composite.

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The only 2-sphenic number concatenated in reverse order from two successive odd numbers, i.e., 8987=11*19*43. Note that the concatenation in reverse order of these factors, i.e., 431911 is prime. [Loungrides]

Submitted: 2018-06-03 05:16:39;   Last Modified: 2019-02-05 15:56:11.
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