138000668 has 18 divisors (see below), whose sum is σ = 261508464. Its totient is φ = 63692304.

The previous prime is 138000661. The next prime is 138000673. The reversal of 138000668 is 866000831.

138000668 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

138000668 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138000661) 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 in 5 ways as a sum of consecutive naturals, for example, 101396 + ... + 102747.

It is an arithmetic number, because the mean of its divisors is an integer number (14528248).

Almost surely, 2^138000668 is an apocalyptic number.

It is an amenable number.

138000668 is a deficient number, since it is larger than the sum of its proper divisors (123507796).

138000668 is a wasteful number, since it uses less digits than its factorization.

138000668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204173 (or 204158 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 138000668 is about 11747.3685564045. The cubic root of 138000668 is about 516.7657590490.

The spelling of 138000668 in words is "one hundred thirty-eight million, six hundred sixty-eight", and thus it is an aban number.