2999999999

2999999999 is the integer with decimal value 2,999,999,999. It equals 3,000,000,000 minus 1, and its decimal representation consists of a 2 followed by nine 9s.

It is an odd number. The sum of its digits is 83, so it is not divisible by 3 or 9. It ends in 9, so it is not divisible by 2 or 5. Quick divisibility checks indicate it is not divisible by 7 or 11 either (mod 7 gives a remainder of 3; the alternating sum of digits modulo 11 is -7). These observations do not determine primality, but they show it is not divisible by several small primes.

In other bases, 2999999999 equals 0xB2D05DFF in hexadecimal and 10110010110100000101110111111111 in binary.

From a computing perspective, 2,999,999,999 exceeds the maximum value of a signed 32-bit integer (2,147,483,647) but fits in an unsigned 32-bit integer. In languages with big integers, it is treated as a standard integer value without special meaning.

As a representative large decimal, 2999999999 is often used in examples and test data to probe arithmetic, formatting, or overflow behavior in software systems.

Related numbers include 2999999998 and 3000000000, and it sits just below 3×10^9.