2000 has two representations as the sum of two squares: 2000 = 82 + 442 = 202 + 402.
2000 is 5555 in base 7.
Mathematician John B. Cosgrove of St. Patrick's College in Dublin, Ireland, discovered a 2000-digit prime (for the millennium).
1 short ton is 2,000 pounds.
Source: Numeropedia
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