|Cardinal||One hundred [and]|
One hundred [and] thirty-seven 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.
The numerical value of the fine structure constant α, a dimensionless physical constant, is approximately 1/137. The physicist Arthur Eddington at one time thought α to be exactly 1/137, but careful measurements have shown this not to be the case: its value is currently estimated at 1/137.035 999 76(50).
This leads to predictions on the nature of electron orbitals. See untriseptium.
137 is also:
- The year AD 137 or 137 BC.
- The Gematria (i.e. Hebrew numerology) value of the word "Kabbalah", which is of special significance to Jewish mystics.