138196539 has 36 divisors (see below), whose sum is σ = 221285064. Its totient is φ = 83026944.

The previous prime is 138196507. The next prime is 138196547. The reversal of 138196539 is 935691831.

It is not a de Polignac number, because 138196539 - 2⁵ = 138196507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138196494 and 138196503.

It is not an unprimeable number, because it can be changed into a prime (138196589) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 64347 + ... + 66459.

Almost surely, 2^138196539 is an apocalyptic number.

138196539 is a deficient number, since it is larger than the sum of its proper divisors (83088525).

138196539 is a wasteful number, since it uses less digits than its factorization.

138196539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188 (or 2172 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 138196539 is about 11755.7024035146. The cubic root of 138196539 is about 517.0101336515.

The spelling of 138196539 in words is "one hundred thirty-eight million, one hundred ninety-six thousand, five hundred thirty-nine".