27
This number is a composite.
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The smallest 2-digit number in which the sum of digits is equal to the sum of prime factors (27 = 3 * 3 * 3 and 3 + 3 + 3 = 9). [Russo]
Submitted: 2001-08-13 10:06:30; Last Modified: 2009-12-24 13:58:58.
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