38694181 has 2 divisors, whose sum is σ = 38694182. Its totient is φ = 38694180.

The previous prime is 38694167. The next prime is 38694199. The reversal of 38694181 is 18149683.

38694181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37761025 + 933156 = 6145^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 38694181 - 2¹¹ = 38692133 is a prime.

It is a super-2 number, since 2×38694181² = 2994479286521522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38694581) 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, 19347090 + 19347091.

It is an arithmetic number, because the mean of its divisors is an integer number (19347091).

Almost surely, 2^38694181 is an apocalyptic number.

It is an amenable number.

38694181 is a deficient number, since it is larger than the sum of its proper divisors (1).

38694181 is an equidigital number, since it uses as much as digits as its factorization.

38694181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 38694181 is about 6220.4646932524. The cubic root of 38694181 is about 338.2324096291.

The spelling of 38694181 in words is "thirty-eight million, six hundred ninety-four thousand, one hundred eighty-one".