The calculated distance (air line) between Nizhnegorskiy and Pervomayskoye is approximately 47 miles respectively 75 kilometers.
By car or train, the actual journey to Pervomayskoye is certainly longer, as only the direct route (as the crow flies) between Nizhnegorskiy and Pervomayskoye has been calculated here.
Air line (approximately)
75 kilometers
40 nautical miles