Subject: What are the properties of a Kerr-Newman black hole

After doing some research I found that a Schwarzschild black hole has one 
photon sphere and one event horizon, a charged black hole has one photon sphere 
and two event horizons, and that a rotating black hole has two photon spheres 
(co-rotating and counter-rotating), an ergosphere, and two event horizons. What 
about a Kerr-Newman black hole? I found no information about this on any of the 
black hole websites. Specifically, are there 4 event horizons? How do the 
charge and angular momentum affect each other?

Re: What are the properties of a Kerr-Newman black hole