The number "999 million" represents a quantity that is just one million less than one billion. In numerical form, it is written as 999,000,000. This figure is often used in contexts such as population statistics, financial reports, or large-scale data analysis, where large numbers are common. In terms of comparison, 999 million is significantly larger than 1 million, which is often used to illustrate smaller populations or financial figures. For example, a city with a population of 999 million would be one of the largest in the world, surpassing even the population of entire countries.