37 is the natural number following 36 and preceding 38

In mathematics it is a prime number, the fifth lucky prime, the first irregular prime, the third unique prime and the third cuban prime of the form
 
It is a factor of all 3-digit base 10 repdigits, such as 111. 37 is the smallest prime that is not also a supersingular prime. It is a centered hexagonal number and a star number.

37 and 38 are the first pair of consecutive positive integers not divisible by any of their digits.

Every positive integer is the sum of at most 37 fifth powers (see Waring's problem).

37 appears in the Padovan sequence, preceded by the terms 16, 21, and 28 (it is the sum of the first two of these).

Since the greatest prime factor of 372 + 1 = 1370 is 137, which is obviously more than 37 twice, 37 is a Størmer number.

37 is the only two digit number whose product, when multiplied twice, subtracted by one, and then read backwards, equals the original two digit number: 37x2=74-1=73, 73 backwards is 37

Furthermore, 37 is the atomic number of Rubidium.

We came from here: Siehe auch: to eat s.o. out #36 and will - Gods willing - continue for quite some time...