no a natural number must be positive
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There is some disagreement as to whether zero, a whole number, belongs to the set of natural numbers.
Any of the negative integers (-1, -2, -3, ... ) is whole but not natural.
The set of negative integers.
Every whole number is rational and an integer. But the "natural" numbers are definedas the counting numbers, so the negative whole numbers wouldn't qualify.No and yes: it is not a natural number but it is a rational number.
Since a natural number is defined as a whole, non-negative number, 87 would indeed be a natural number.