138337239 has 16 divisors (see below), whose sum is σ = 191086560. Its totient is φ = 88957440.

The previous prime is 138337231. The next prime is 138337267. The reversal of 138337239 is 932733831.

It is not a de Polignac number, because 138337239 - 2³ = 138337231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138337197 and 138337206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138337231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4629 + ... + 17265.

It is an arithmetic number, because the mean of its divisors is an integer number (11942910).

Almost surely, 2^138337239 is an apocalyptic number.

138337239 is a deficient number, since it is larger than the sum of its proper divisors (52749321).

138337239 is a wasteful number, since it uses less digits than its factorization.

138337239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12770.

The product of its digits is 81648, while the sum is 39.

The square root of 138337239 is about 11761.6852108871. The cubic root of 138337239 is about 517.1855327685.

The spelling of 138337239 in words is "one hundred thirty-eight million, three hundred thirty-seven thousand, two hundred thirty-nine".