138552139 has 6 divisors (see below), whose sum is σ = 152292980. Its totient is φ = 125956380.

The previous prime is 138552133. The next prime is 138552151. The reversal of 138552139 is 931255831.

It is a happy number.

It is not a de Polignac number, because 138552139 - 2³ = 138552131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138552098 and 138552107.

It is not an unprimeable number, because it can be changed into a prime (138552131) 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, 572409 + ... + 572650.

Almost surely, 2^138552139 is an apocalyptic number.

138552139 is a deficient number, since it is larger than the sum of its proper divisors (13740841).

138552139 is a wasteful number, since it uses less digits than its factorization.

138552139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145081 (or 1145070 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 138552139 is about 11770.8172613460. The cubic root of 138552139 is about 517.4532015216.

The spelling of 138552139 in words is "one hundred thirty-eight million, five hundred fifty-two thousand, one hundred thirty-nine".