191999999

191999999 is a large integer. It is a prime number, meaning it is only divisible by 1 and itself. Its digits are 1, 9, 1, 9, 9, 9, 9, 9, 9, 9. This number is one less than two hundred million. It falls between 191999998 and 192000000. The sum of its digits is 67. In terms of magnitude, it is a nine-digit number. It can be expressed in scientific notation as approximately 1.91999999 x 10^8. The number does not have any immediately obvious significant mathematical properties beyond its primality and its specific numerical value. Further analysis might reveal less common number theoretic characteristics, but without a specific context or application, its significance remains as a distinct prime integer.