138385033 has 2 divisors, whose sum is σ = 138385034. Its totient is φ = 138385032.

The previous prime is 138385021. The next prime is 138385073. The reversal of 138385033 is 330583831.

It is a happy number.

138385033 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., 120297024 + 18088009 = 10968^2 + 4253^2 .

It is a cyclic number.

It is not a de Polignac number, because 138385033 - 2⁵ = 138385001 is a prime.

It is a super-2 number, since 2×138385033² = 38300834716822178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138385033.

It is not a weakly prime, because it can be changed into another prime (138385073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69192516 + 69192517.

It is an arithmetic number, because the mean of its divisors is an integer number (69192517).

Almost surely, 2^138385033 is an apocalyptic number.

It is an amenable number.

138385033 is a deficient number, since it is larger than the sum of its proper divisors (1).

138385033 is an equidigital number, since it uses as much as digits as its factorization.

138385033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 138385033 is about 11763.7168020996. The cubic root of 138385033 is about 517.2450865551.

The spelling of 138385033 in words is "one hundred thirty-eight million, three hundred eighty-five thousand, thirty-three".