The engines are perfectly round... the nacelles are not!
The first 737s (737-100 and 737-200) had turbojet engines that had a small diameter. When Boeing developed the 737-300/-400/-500s, they had to fit turbofans underneath the wings that were much larger in diameter than the turbojets.
That's why they "cut" the nacelle like this, to provide sufficient ground clearance.
The nacelles on the 737-600 to 737-900 have a similar "cut" but not that pronounced (different nacelle design).
skal
The Boeing 737 NG has 2 engines (CFM International CFM56)
Two (2)
2. One under each wing.
Aircraft engines are calculated on thrust no hp. 737 thrust is 172500 lbs each
Assuming you mean Alaskan Airlines, their fleet consists of: Boeing 737-900 Boeing 737-900ER Boeing 737-800 Boeing 737-700 Boeing 737-400 Boeing 737-400 Combi Bombardier Q400 Bombardier CRJ-700
The Boeing 737 is assembled in Renton, WA
Boeing 737-100
The Boeing 737-900ER cost $89.6 million.
The CFM International CM56-7B27 on their Boeing 737-800 while the CFM International CFM56-3B-2 on their Boeing 737-400
The number 737 is "seven hundred thirty-seven." The aircraft, the Boeing 737, is spoken "Boeing seven thirty-seven."
The Boeing 737-900 is 138 ft. 2 in. (42.1 meters).
Boeing did, of course.