37273981 has 2 divisors, whose sum is σ = 37273982. Its totient is φ = 37273980.

The previous prime is 37273963. The next prime is 37273987. The reversal of 37273981 is 18937273.

37273981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36711481 + 562500 = 6059^2 + 750^2 .

It is an emirp because it is prime and its reverse (18937273) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37273981 - 2⁷ = 37273853 is a prime.

It is a super-2 number, since 2×37273981² = 2778699319176722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37273987) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18636990 + 18636991.

It is an arithmetic number, because the mean of its divisors is an integer number (18636991).

Almost surely, 2^37273981 is an apocalyptic number.

It is an amenable number.

37273981 is a deficient number, since it is larger than the sum of its proper divisors (1).

37273981 is an equidigital number, since it uses as much as digits as its factorization.

37273981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 37273981 is about 6105.2420918421. The cubic root of 37273981 is about 334.0426547410.

The spelling of 37273981 in words is "thirty-seven million, two hundred seventy-three thousand, nine hundred eighty-one".