37538381 has 2 divisors, whose sum is σ = 37538382. Its totient is φ = 37538380.

The previous prime is 37538359. The next prime is 37538419. The reversal of 37538381 is 18383573.

It is a happy number.

37538381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (37538419) can be obtained adding 37538381 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27984100 + 9554281 = 5290^2 + 3091^2 .

It is a cyclic number.

It is not a de Polignac number, because 37538381 - 2⁶ = 37538317 is a prime.

It is a super-2 number, since 2×37538381² = 2818260096202322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37538311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18769190 + 18769191.

It is an arithmetic number, because the mean of its divisors is an integer number (18769191).

Almost surely, 2^37538381 is an apocalyptic number.

It is an amenable number.

37538381 is a deficient number, since it is larger than the sum of its proper divisors (1).

37538381 is an equidigital number, since it uses as much as digits as its factorization.

37538381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 37538381 is about 6126.8573510406. The cubic root of 37538381 is about 334.8306294648.

The spelling of 37538381 in words is "thirty-seven million, five hundred thirty-eight thousand, three hundred eighty-one".