138817005 has 16 divisors (see below), whose sum is σ = 222676224. Its totient is φ = 73846080.

The previous prime is 138817001. The next prime is 138817013. The reversal of 138817005 is 500718831.

138817005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138817005 - 2² = 138817001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138817001) 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, 5701 + ... + 17610.

It is an arithmetic number, because the mean of its divisors is an integer number (13917264).

Almost surely, 2^138817005 is an apocalyptic number.

138817005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138817005 is a deficient number, since it is larger than the sum of its proper divisors (83859219).

138817005 is a wasteful number, since it uses less digits than its factorization.

138817005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23716.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 138817005 is about 11782.0628499427. The cubic root of 138817005 is about 517.7827249250.

The spelling of 138817005 in words is "one hundred thirty-eight million, eight hundred seventeen thousand, five".