138135605 has 8 divisors (see below), whose sum is σ = 174487200. Its totient is φ = 104692176.

The previous prime is 138135589. The next prime is 138135617. The reversal of 138135605 is 506531831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138135605 - 2⁴ = 138135589 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726935 + ... + 727124.

It is an arithmetic number, because the mean of its divisors is an integer number (21810900).

Almost surely, 2^138135605 is an apocalyptic number.

It is an amenable number.

138135605 is a deficient number, since it is larger than the sum of its proper divisors (36351595).

138135605 is a wasteful number, since it uses less digits than its factorization.

138135605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454083.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 138135605 is about 11753.1104393688. The cubic root of 138135605 is about 516.9341353015.

The spelling of 138135605 in words is "one hundred thirty-eight million, one hundred thirty-five thousand, six hundred five".