For 991 to be an integer, 991 has to be a whole number. Furthermore, for 991 to be an integer, you should be able to write 991 without a fractional or decimal component.
991 is a whole number that can be written without a fractional component, thus 991 is an integer.
The answer to the question: "Is 991 an integer?" is YES.
Integer?
Check other numbers to see if they are integers.
Is 992 an Integer?
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More Information from Research Maniacs:
Is 991 a prime number?
Now you know that 991 is an integer, but do you know if 991 is a prime number?
What are the factors of 991?
What are the factors of the integer 991 you ask?
Is 991 a square number?
Find out if 991 is a perfect square number!
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