799999

799,999 is a natural number that immediately precedes 800,000. In decimal notation it is written as 799999, and in words as seven hundred ninety-nine thousand nine hundred ninety-nine. It is equal to 800,000 minus 1, and lies in the six-digit range.

Mathematical properties: It is odd and not divisible by 2 or 5. The sum of its digits is 52, so it is not divisible by 3 or 9. It is congruent to 7 modulo 9. The full prime factorization is not immediately apparent and would require a divisibility test up to the square root of 799,999 to determine primality.

Representations: In hexadecimal, 799,999 equals C34FF. In binary, it is 11000011010011111111. In scientific notation, it is approximately 7.99999 × 10^5.

In mathematics and computing, numbers like 799,999 are used as examples of large six-digit integers and as boundary values near the transition to seven-digit numbers.