The unique four-digit integer n with the given properties number is
3969 and it is a square of 63.
What is the integer?
The integer is a number with no decimal or fractional part, from the set of negative and positive numbers, including zero.
The last digit (the units digit) of is 9.
The digits of n add up to 27.
Two digits of n are the same.
n is a perfect square
Therefore we get
[tex]63^2=3969.[/tex]
The number is 3969. It is a square of 63.
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