247 is a composite number. It is the thirteenth pentagonal number. Its prime factorization is 13x19. This is the floor of the number of acres in a km^2. 247 also resembles the abbreviation 24/7 (24 hours a day, 7 days a week).
- 247 is a composite number, as it is divisible by 13.
- 247 is a semiprime because it is the product of two prime numbers.
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