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584 thousand 549 in word form is five hundred eighty-four thousand five hundred forty-nine. In number form, it is 584,549.
Half of 549 is 274.5. This is calculated by dividing 549 by 2.
Under the rules now governing the Roman numeral system that were set up in the Middle Ages long after the collapse of the Roman Empire the equivalent of 549 converted into Roman numerals is now considered to be DXLIX but the ancient Romans would have wrote it out simply as IDL which means 550-1 = 549
To write 549 in scientific notation, you should move the decimal point to the left so that there is one nonzero digit to the left of the decimal point. This would make it 5.49. Then, express it as a number between 1 and 10 by dividing it by 10. Finally, multiply it by 10 raised to the power of the number of places you moved the decimal point. In this case, it would be 5.49 x 10^2.
549 is composite, because it is divisible by 1, 3, 9, 61, 183 and 549. A prime number may be divisible only by 1 and itself. The sum of the digits in 549 equals 18. which is divisible by 3. That means 549 is divisible by 3 in addition to 1 and itself.