Is 1639 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 1639 is composite or not first we have to find its factors.
Contents
Factors of 1639:
- If we have taken numbers from 1, 2, 3…for checking factors of 1639, we found that 1639 has factors 1, 11, 149 and 1639. Hence, we must say that 1639 is a composite number.
- Thus, 1639 is the composite number.
- If we multiply 1639 by 1, 2, 3 then we get the multiples of 1639 which are 1639, 3278 and so on.
1639 is a Composite number or Prime number
About the number 1639:
- 1639 has more than two factors which are 1, 11, 149 and 1639 and hence it is the composite number.
- 1639 is the odd composite number and it is not the perfect square also.
- If we divide 1639 by 1, 11, 149 and 1639 then we get remainder as zero. Hence, 1, 11, 149 and 1639 are the factors of 1639
Note:
- 1639 is not the perfect square.
- Factors of 1639: 1, 11, 149 and 1639
- Prime factors of 1639: 11, 149
Conclusion:
- 1639 is the composite number which has factors 1, 11, 149 and 1639.
- And hence, 1639 is not the prime number.
Multiple Choice Questions:
1) 1639 is a
a) Even number
b) Prime number
c) Composite number
d) Both a and c
Ans: c) composite number
2) The non-prime factors of a composite number 1639 are
a) 1
b) 11, 149
c) 1 and 1639
d) 1, 11, 149 and 1639
Ans: b) 1 and 1639
3) 1639 is the odd composite number because
a) It has factors 1, 11, 149 and 1639
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all