For 1019 to be an integer, 1019 has to be a whole number. Furthermore, for 1019 to be an integer, you should be able to write 1019 without a fractional or decimal component.
1019 is a whole number that can be written without a fractional component, thus 1019 is an integer.
The answer to the question: "Is 1019 an integer?" is YES.
Integer?
Check other numbers to see if they are integers.
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More Information from Research Maniacs:
Is 1019 a prime number?
Now you know that 1019 is an integer, but do you know if 1019 is a prime number?
What are the factors of 1019?
What are the factors of the integer 1019 you ask?
Is 1019 a square number?
Find out if 1019 is a perfect square number!
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