Talk:7744

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Template:WikiProject banner shell Its not a self number since its digit addition generator is 7724 + (7 + 7 + 2 + 4). 141.217.173.161 22:43, 22 Aug 2004 (UTC)

Isolated digits

"It is the only known square number which has no isolated digits."

Can anyone tell me what "isolated digits" are in this context?

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