38665189 has 2 divisors, whose sum is σ = 38665190. Its totient is φ = 38665188.

The previous prime is 38665183. The next prime is 38665229. The reversal of 38665189 is 98156683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33062500 + 5602689 = 5750^2 + 2367^2 .

It is an emirp because it is prime and its reverse (98156683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38665189 - 2¹⁵ = 38632421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38665183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19332594 + 19332595.

It is an arithmetic number, because the mean of its divisors is an integer number (19332595).

Almost surely, 2^38665189 is an apocalyptic number.

It is an amenable number.

38665189 is a deficient number, since it is larger than the sum of its proper divisors (1).

38665189 is an equidigital number, since it uses as much as digits as its factorization.

38665189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 46.

The square root of 38665189 is about 6218.1338840524. The cubic root of 38665189 is about 338.1479138568.

The spelling of 38665189 in words is "thirty-eight million, six hundred sixty-five thousand, one hundred eighty-nine".