Is the PageRank (PR) number for the entire site or individual pages?
PageRank is determined for each specific Web page (document). Every page on your website very likely has a different PR. A given site’s home page probably has the highest PR, since it probably has the most sites linking to it. Each internal page may have a different Google PageRank. Sometimes, the PageRank for an informative and popular article on an internal page of a Web site will be higher than that of the sites home page.