This number is a prime.

Just showing those entries submitted by 'Loungrides': (Click here to show all)

+ The first prime (emirp) p of the type p=q*R(q)-(q+R(q)) where R(q) is the reversal of q. (Case q=13). [Loungrides]

+ The smallest emirp that gives other emirps when sandwiched between two n's in two ways (13591, 73597). [Loungrides]

+ This emirp can be represented as the product of the positive even digits minus the sum of the odd digit, i.e., 2*4*6*8-(1+3+5+7+9). [Loungrides]

+ The largest emirp that consists of odd digits concatenated in ascending order. [Loungrides]

+ The only odd-digit emirp that can be represented as product of a double-digit even number and its reversal minus 1, i.e, 60*06-1=359. [Loungrides]

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