138008005 has 8 divisors (see below), whose sum is σ = 166477824. Its totient is φ = 109827600.

The previous prime is 138007999. The next prime is 138008041. The reversal of 138008005 is 500800831.

138008005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138008005 - 2¹⁵ = 137975237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71301 + ... + 73210.

It is an arithmetic number, because the mean of its divisors is an integer number (20809728).

Almost surely, 2^138008005 is an apocalyptic number.

It is an amenable number.

138008005 is a deficient number, since it is larger than the sum of its proper divisors (28469819).

138008005 is a wasteful number, since it uses less digits than its factorization.

138008005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144707.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 138008005 is about 11747.6808349563. The cubic root of 138008005 is about 516.7749170799.

Adding to 138008005 its reverse (500800831), we get a palindrome (638808836).

The spelling of 138008005 in words is "one hundred thirty-eight million, eight thousand, five".