Automorphic Number

In mathematics an automorphic number (sometimes referred to as a circular number) is a number whose square "ends" in the same digits as the number itself. For example,

• 5² = 25
• 6² = 36
• 76² = 5776
• 376² = 141376
• 890625² = 793212890625

So 5, 6, 76, 376 and 890625 are automorphic numbers.

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