138319039 has 6 divisors (see below), whose sum is σ = 139340760. Its totient is φ = 137304756.

The previous prime is 138319037. The next prime is 138319043. The reversal of 138319039 is 930913831.

It is not a de Polignac number, because 138319039 - 2¹ = 138319037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138318989 and 138319007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138319037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15742 + ... + 22900.

It is an arithmetic number, because the mean of its divisors is an integer number (23223460).

Almost surely, 2^138319039 is an apocalyptic number.

138319039 is a deficient number, since it is larger than the sum of its proper divisors (1021721).

138319039 is an frugal number, since it uses more digits than its factorization.

138319039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7437 (or 7298 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 138319039 is about 11760.9114867854. The cubic root of 138319039 is about 517.1628510245.

The spelling of 138319039 in words is "one hundred thirty-eight million, three hundred nineteen thousand, thirty-nine".