38682181 has 2 divisors, whose sum is σ = 38682182. Its totient is φ = 38682180.

The previous prime is 38682173. The next prime is 38682197. The reversal of 38682181 is 18128683.

38682181 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., 29257281 + 9424900 = 5409^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 38682181 - 2³ = 38682173 is a prime.

It is a super-2 number, since 2×38682181² = 2992622253833522, which contains 22 as substring.

It is a Chen prime.

It is the 6220-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 38682181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38682101) by changing a digit.

It is a nontrivial repunit in base 6219.

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, 19341090 + 19341091.

It is an arithmetic number, because the mean of its divisors is an integer number (19341091).

Almost surely, 2^38682181 is an apocalyptic number.

It is an amenable number.

38682181 is a deficient number, since it is larger than the sum of its proper divisors (1).

38682181 is an equidigital number, since it uses as much as digits as its factorization.

38682181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 37.

The square root of 38682181 is about 6219.5000602942. The cubic root of 38682181 is about 338.1974413345.

The spelling of 38682181 in words is "thirty-eight million, six hundred eighty-two thousand, one hundred eighty-one".