138930503 has 4 divisors (see below), whose sum is σ = 143721240. Its totient is φ = 134139768.

The previous prime is 138930469. The next prime is 138930521. The reversal of 138930503 is 305039831.

138930503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305039831 = 281 ⋅1085551.

It is a cyclic number.

It is not a de Polignac number, because 138930503 - 2⁶ = 138930439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138930503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138930593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2395325 + ... + 2395382.

It is an arithmetic number, because the mean of its divisors is an integer number (35930310).

Almost surely, 2^138930503 is an apocalyptic number.

138930503 is a deficient number, since it is larger than the sum of its proper divisors (4790737).

138930503 is an equidigital number, since it uses as much as digits as its factorization.

138930503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790736.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 138930503 is about 11786.8784247569. The cubic root of 138930503 is about 517.9238010483.

The spelling of 138930503 in words is "one hundred thirty-eight million, nine hundred thirty thousand, five hundred three".