The Press and Journal reported that emergency services were called at around 2:30pm on Wednesday, but the cyclist was pronounced dead at the scene.
A police spokesperson said his family has been informed.
A section of the A90 was closed for six hours while officers investigated, reopening at 8:30pm.
A police spokeswoman said: “We were called around 2.30pm on Wednesday December 2 to a report of a crash involving two vehicles and a cyclist, on the A90 near Boddam.
“Sadly the 52-year-old cyclist died at the scene and his family have been informed.
“The road was closed for six hours to allow for collision investigation work and re-opened around 8.30pm.
“Anyone with information that can help with our enquiries into what happened is asked to call us on 101, quoting incident 1710 of Wednesday, 2 December, 2020.”