No, it isn't. In fact, it is not known whether are odd perfect numbers exist. The first perfect numbers are 6, 28, 496, and 8128.
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495/5 = 99 99/33=3 its composite
495/99 = 5 which is a whole number, not a proper fraction.
Half of 495 is 247.5. To find half of a number, you can simply divide the number by 2. In this case, 495 divided by 2 equals 247.5. This is because dividing by 2 is the same as multiplying by 0.5, which effectively cuts the number in half.
The sum of the 1st perfect number and 2nd perfect number is. . . 34!
If by 'perfect number' you mean 'perfect SQUARE', then yes. 49 is an odd number and a perfect square.