• 37 can be written using four 4's:
37 is nontrivially palindromic in base 6.
37 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is the 3-rd star number.
37 is an esthetic number in base 6, base 8 and base 11, because in such bases its adjacent digits differ by 1.
It is a strong prime.
37 is a truncatable prime.
It is a cyclic number.
It is a Chen prime.
37 is an idoneal number.
37 is an undulating number in base 6.
37 is a lucky number.
It is a plaindrome in base 5, base 8, base 10, base 11, base 13, base 14, base 15 and base 16.
It is a nialpdrome in base 4, base 7, base 9 and base 12.
It is a congruent number.
It is a panconsummate number.
It is an upside-down number.
It is a good prime.
It is a Pierpont prime, being equal to 22 ⋅ 32 + 1.
37 is the 4-th hex number.
It is an amenable number.
37 is an equidigital number, since it uses as much as digits as its factorization.
37 is an odious number, because the sum of its binary digits is odd.
The square root of 37 is about 6.0827625303. The cubic root of 37 is about 3.3322218516.
Subtracting from 37 its sum of digits (10), we obtain a cube (27 = 33).
Subtracting from 37 its product of digits (21), we obtain a 4-th power (16 = 24).
Multiplying 37 by its product of digits (21), we get a palindrome (777).
Subtracting 37 from its reverse (73), we obtain a triangular number (36 = T8).
Multiplying 37 by its reverse (73), we get a triangular number (2701 = T73).