138375839 has 4 divisors (see below), whose sum is σ = 158143824. Its totient is φ = 118607856.

The previous prime is 138375833. The next prime is 138375883. The reversal of 138375839 is 938573831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138375839 - 2⁴ = 138375823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138375793 and 138375802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138375833) 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 3 ways as a sum of consecutive naturals, for example, 9883982 + ... + 9883995.

It is an arithmetic number, because the mean of its divisors is an integer number (39535956).

Almost surely, 2^138375839 is an apocalyptic number.

138375839 is a deficient number, since it is larger than the sum of its proper divisors (19767985).

138375839 is an equidigital number, since it uses as much as digits as its factorization.

138375839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19767984.

The product of its digits is 544320, while the sum is 47.

The square root of 138375839 is about 11763.3260177554. The cubic root of 138375839 is about 517.2336314227.

The spelling of 138375839 in words is "one hundred thirty-eight million, three hundred seventy-five thousand, eight hundred thirty-nine".