999,993,000 is nine hundred ninety-nine milliion, nine hundred ninety-three thousand.
Work Step by Step
Start at the left when writing a number in words or saying it aloud. Write or say the digit names in each period (group), followed by the name of the period, except for the period name “ones,” which is not used. Separate the period groups by commas. When a period contains all zeroes it is omitted altogether when stating the number in words.