138123003 has 16 divisors (see below), whose sum is σ = 185748480. Its totient is φ = 91294176.

The previous prime is 138122993. The next prime is 138123017. The reversal of 138123003 is 300321831.

It is a happy number.

It is not a de Polignac number, because 138123003 - 2⁶ = 138122939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138123203) 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 in 15 ways as a sum of consecutive naturals, for example, 288118 + ... + 288596.

It is an arithmetic number, because the mean of its divisors is an integer number (11609280).

Almost surely, 2^138123003 is an apocalyptic number.

138123003 is a deficient number, since it is larger than the sum of its proper divisors (47625477).

138123003 is a wasteful number, since it uses less digits than its factorization.

138123003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 138123003 is about 11752.5743137408. The cubic root of 138123003 is about 516.9184149951.

Adding to 138123003 its reverse (300321831), we get a palindrome (438444834).

The spelling of 138123003 in words is "one hundred thirty-eight million, one hundred twenty-three thousand, three".