503999
503999 is a six-digit number. It is an integer that falls between 503998 and 504000. In terms of its prime factorization, 503999 is a prime number. This means it is only divisible by 1 and itself. The number itself does not have any widely recognized special mathematical properties beyond its primality.
In contexts outside of pure mathematics, the sequence of digits "503999" might appear as a numerical identifier.