Is 1917 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 1917 is composite or not first we have to find its factors.
Contents
Factors of 1917:
- If we have taken numbers from 1, 2, 3…for checking factors of 1917, we found that 1917 has factors 1, 3, 9, 27, 71, 213, 639 and 1917. Hence, we must say that 1917 is a composite number.
- Thus, 1917 is the composite number.
- If we multiply 1917 by 1, 2, 3 then we get the multiples of 1917 which are 1917, 3834 and so on.
1917 is a Composite number or Prime number
About the number 1917:
- 1917 has more than two factors which are 1, 3, 9, 27, 71, 213, 639 and 1917 and hence it is the composite number.
- 1917 is the odd composite number and it is not the perfect square also.
- If we divide 1917 by 1, 3, 9, 27, 71, 213, 639 and 1917 then we get remainder as zero. Hence, 1, 3, 9, 27, 71, 213, 639 and 1917 are the factors of 1917
Note:
- 1917 is not the perfect square.
- Factors of 1917: 1, 3, 9, 27, 71, 213, 639 and 1917
- Prime factors of 1917: 3, 71
Conclusion:
- 1917 is the composite number which has factors 1, 3, 9, 27, 71, 213, 639 and 1917.
- And hence, 1917 is not the prime number.
Multiple Choice Questions:
1) 1917 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 1917 are
a) 1
b) 3, 71
c) 1, 9, 27, 213, 639 and 1917
d) 1, 3, 9, 27, 71, 213, 639 and 1917
Ans: b) 1, 9, 27, 213, 639 and 1917
3) 1917 is the odd composite number because
a) It has factors 1, 3, 9, 27, 71, 213, 639 and 1917
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all