The ratio of 17/8 is essentially a large septendecimal semitone (17/16) - and the distance between the 17th and the 8th harmonic - but one octave higher.

Interval information
Ratio 17/8
Subgroup monzo 2.17 [-3 1
Size in cents 1304.955¢
Name(s) missing ? 
FJS name [math]\displaystyle{ \text{m9}^{17} }[/math]
Tenney norm (log2 nd) 7.08746
Weil norm (log2 max(n, d)) 8.17493
Wilson norm (sopfr(nd)) 23
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This interval spans the size of 1304.95541 cents.