This is something I noted once when reading Genesis, and am still wondering if there's any meaning to it. Genesis tells us that Noah was 599-600 years old1 when the flood came. Genesis 7:11 (ESV) ...
In Genesis 5, some of the descendants of Adam are listed with their ages. The people listed lived very much longer than anybody does today. For example, Adam lived to be 930. The oldest age, 969 ...