Is 1387 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 1387 is composite or not first we have to find its factors.
Contents
Factors of 1387:
- If we have taken numbers from 1, 2, 3…for checking factors of 1387, we found that 1387 has factors 1, 19, 73 and 1387. Hence, we must say that 1387 is a composite number.
- Thus, 1387 is the composite number.
- If we multiply 1387 by 1, 2, 3 then we get the multiples of 1387 which are 1387, 2774 and so on.
1387 is a Composite number or Prime number
About the number 1387:
- 1387 has more than two factors which are 1, 19, 73 and 1387 and hence it is the composite number.
- 1387 is the odd composite number and it is not the perfect square also.
- If we divide 1387 by 1, 19, 73 and 1387 then we get remainder as zero. Hence, 1, 19, 73 and 1387 are the factors of 1387
Note:
- 1387 is not the perfect square.
- Factors of 1387: 1, 19, 73 and 1387
- Prime factors of 1387: 19, 73
Conclusion:
- 1387 is the composite number which has factors 1, 19, 73 and 1387.
- And hence, 1387 is not the prime number.
Multiple Choice Questions:
1) 1387 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 1387 are
a) 1
b) 19, 73
c) 1 and 1387
d) 1, 19, 73 and 1387
Ans: b) 1 and 1387
3) 1387 is the odd composite number because
a) It has factors 1, 19, 73 and 1387
b) It has more than two factors
c) It is not divisible by 2
d) all
Ans: d) all