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The challenge involves mathematics in some central way. Also consider using more specific tags, listed in the tag wiki info.
8
votes
Test a number for narcissism
PHP, 80 74 66 chars
Very straightforward PHP solution:
<?for(;$i<$l=strlen($a=$argv[1]);)$s+=pow($a[$i++],$l);echo$s==$a;
It assumes error_reporting doesn't include notices, otherwise quite a few …