SEATTLE — Jeff Bezos, Amazon’s founder and chief executive, long ago figured out how to keep Amazon’s sales figures shooting skyward. Now he is doing the same with profit.

The company, which once seemed to have only a passing interest in turning a profit, said its net income for the first quarter more than doubled. Although Amazon is best known as an internet shopping destination, its cloud computing and advertising businesses were big contributors to the jump in profit.

Mr. Bezos singled out the performance of the company’s cloud computing business — known as Amazon Web Services, or A.W.S. — referring in a statement to a “remarkable acceleration” in growth in the segment for a second consecutive quarter.

Amazon often boasts of its commitment to lowering prices — part of the reason its profits have been so limited until now — but on Thursday it announced a price hike for one of its most important offerings. The company said it was raising the price of its Prime membership service 20 percent, to $119 from $99. Prime memberships include two-day shipping at no extra cost, a video streaming service and other benefits.