It is not a perfect square number.
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The number 998 is "nine hundred ninety-eight."
Largest three digit number is 999 and we see that it is odd. One less than that is 998 and it is even and it is also three digits. No other 3 digit number is larger than 998 while being even.
There are 998 of them: 2, 3, 4, 5, ... , 996, 997 998 and 999.
998
998 - 3 digits even number Next even number is 1000 - 4 digits. So 998 is the largest ...