859 is a prime number.
857 and 859 form a twin prime pair.
859 is the largest prime that cannot be the central number in a 3-by-3 magic square.
859 is the sum of nine positive fifth powers: 859 = 15 + 15 + 25 + 25 + 25 + 25 + 35 + 35 + 35.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggS8_ahVjT8iKo9yt2ZbiFkxIvioss_7-mwlM4kALCOEUleDcXQAxY0_phAuUo5yy95W8B9eOoIjnzjwDD81tB4hTtj4TY3MSF_sjG42_kfuw-12lyhGcNzg6uH7G3r7r4gcKFLVg0tDw/s200/n0859.jpg)
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ah is an asteroid discovered in 1916.Source: Prime Curios!