Possible clues from r/wwiipics:

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Here is a link for a P-47N in the same markings and with the next sequential serial number (4488538) as a member of the 414th Fighter Group in the Pacific. I think it is safe to say these are both P-47Ns, probably both P-47N-5s belonging to the 414th Fighter Group, given the markings. Link to the 414th FG wiki: https://en.wikipedia.org/wiki/414th_Fighter_Group

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According to this page, the aircraft in the background is a P-47N, which is also suggested by the extended vertical surface on the tail and the additional antennas. It seems serial numbers in that vicinity were operated by the 414th FG, and this photo was likely taken on Iwo Jima.