Is 3987 is a composite number or not?
- As we already know that, the number having factors 1 and the number itself is the prime number.
- And numbers having more than these two factors are the composite numbers.
- To check whether the number 3987 is composite or not first we have to find its factors.
Contents
Factors of 3987:
- If we have taken numbers from 1, 2, 3…for checking factors of 3987, we found that 3987 has factors 1, 3, 9, 443, 1329 and 3987. Hence, we must say that 3987 is a composite number.
- Thus, 3987 is the composite number.
- If we multiply 3987 by 1, 2, 3 then we get the multiples of 3987 which are 3987, 7974 and so on.
3987 is a Composite number or Prime number
About the number 3987:
- 3987 has more than two factors which are 1, 3, 9, 443, 1329 and 3987 and hence it is the composite number.
- 3987 is the odd composite number and it is not the perfect square also.
- If we divide 3987 by 1, 3, 9, 443, 1329 and 3987 then we get remainder as zero. Hence 1, 3, 9, 443, 1329 and 3987 are the factors of 3987
Note:
- 3987 is not the perfect square.
- Factors of 3987:1, 3, 9, 443, 1329 and 3987
- Prime factors of 3987: 3, 443
Conclusion:
- 3987 is the composite number which has factors 1, 3, 9, 443, 1329 and 3987.
- And hence, 3987 is not the prime number.
Multiple Choice Questions:
1) 3987 is a
a) odd number
b) Prime number
c) even number
d) Both a and c
Ans: a) odd number
2) The non-prime factors of a composite number 3987 are
a) 1
b) 3, 443
c) 1, 3, 9, 443, 1329 and 3987
d) 1, 9, 1329 and 3987
Ans: d)1, 9, 1329 and 3987
3) 3987 is the odd composite number because
a) It has factors 1, 3, 9, 443, 1329 and 3987
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all
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