Answer
1981 is not perfect because:
Related links:
- All calculations
- Is 1981 a composite number?
- Is 1981 an even number?
- Is 1981 an irrational number?
- Is 1981 an odd number?
- Is 1981 a perfect square?
- Is 1981 a prime number?
- Is 1981 a rational number?
- What are the factors of 1981?
- What are the multiples of 1981?
- What is the prime factorization of 1981?
