To round the number 639,497 to the nearest tenth, we need to look at the digit in the hundredths place, which is the second digit to the right of the decimal point.
In this case, we’re considering the number as 639,497.0. The digit in the tenths place is 0 and the digit in the hundredths place is 0 as well.
Since the digit in the hundredths place is less than 5, we round down. Therefore, 639,497.0 rounded to the nearest tenth remains 639,497.0.
In conclusion, 639,497 rounded to the nearest tenth is 639,497.0.