37093981 has 2 divisors, whose sum is σ = 37093982. Its totient is φ = 37093980.

The previous prime is 37093961. The next prime is 37093999. The reversal of 37093981 is 18939073.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36905625 + 188356 = 6075^2 + 434^2 .

It is a cyclic number.

It is not a de Polignac number, because 37093981 - 2⁷ = 37093853 is a prime.

It is a super-2 number, since 2×37093981² = 2751926852856722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37093921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18546990 + 18546991.

It is an arithmetic number, because the mean of its divisors is an integer number (18546991).

Almost surely, 2^37093981 is an apocalyptic number.

37093981 is the 3256-th centered heptagonal number.

It is an amenable number.

37093981 is a deficient number, since it is larger than the sum of its proper divisors (1).

37093981 is an equidigital number, since it uses as much as digits as its factorization.

37093981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 37093981 is about 6090.4828215832. The cubic root of 37093981 is about 333.5040777463.

The spelling of 37093981 in words is "thirty-seven million, ninety-three thousand, nine hundred eighty-one".