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Billion
Scientific notation
1 × 10^9
Number line
Number name
1 billion
SI prefix
giga (G)
Number length
10 decimal digits
Binary form
111011100110101100101000000000_2
Prime factorization
2^9×5^9
Residues modulo small integers
m | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 1000000000 mod m | 0 | 1 | 0 | 0 | 4 | 6 | 0 | 1
Property
1000000000 = 10^9 is a perfect 9th power.
1000000000 has 5 representations as a sum of 2 squares: 1000000000 = 1200^2 + 31600^2 = 7696^2 + 30672^2 = 10000^2 + 30000^2 = 18000^2 + 26000^2 = 19920^2 + 24560^2
1000000000 is an even number.
Comparison
≈ 0.13 × the number of people alive today (≈ 7.8×10^9)
≈ 10 × the largest number in the Bible, said to be the number of angels ( 1×10^8)