138234903 has 16 divisors (see below), whose sum is σ = 189586656. Its totient is φ = 89538560.

The previous prime is 138234883. The next prime is 138234907. The reversal of 138234903 is 309432831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138234903 - 2⁶ = 138234839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138234907) 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 15 ways as a sum of consecutive naturals, for example, 29425 + ... + 33797.

It is an arithmetic number, because the mean of its divisors is an integer number (11849166).

Almost surely, 2^138234903 is an apocalyptic number.

138234903 is a deficient number, since it is larger than the sum of its proper divisors (51351753).

138234903 is a wasteful number, since it uses less digits than its factorization.

138234903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4674.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 138234903 is about 11757.3340090345. The cubic root of 138234903 is about 517.0579706953.

The spelling of 138234903 in words is "one hundred thirty-eight million, two hundred thirty-four thousand, nine hundred three".