In Mathematics
137 is the 33rd prime number; the next is 139, with which it comprises a twin prime, and thus 137 is a Chen prime.
- 137 is an Eisenstein prime with no imaginary part and a real part of the form .
- It is also the fourth Stern prime.
- 137 is a strong prime in the sense that it is more than the arithmetic mean of its two neighboring primes.
- Using two radii to divide a circle according to the golden ratio yields sectors of approximately 137° (the golden angle) and 222°.
- 137 is a strictly non-palindromic number and a primeval number.
- The fifth harmonic number is
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