Timmy has a collection of jelly beans in a jar. If he groups them in 4's, there is one jelly bean left over at the end. If he groups them in 6's, there is again one left over. If he groups them in 9's, there is again one left over. Finally, Timmy is thrilled to discover that if he groups them in 7's, there are no beans left over. What is the smallest number of jelly beans in Timmy's jar?