138327865 has 32 divisors (see below), whose sum is σ = 189455616. Its totient is φ = 96180480.

The previous prime is 138327863. The next prime is 138327887. The reversal of 138327865 is 568723831.

It is not a de Polignac number, because 138327865 - 2¹ = 138327863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138327863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99475 + ... + 100855.

It is an arithmetic number, because the mean of its divisors is an integer number (5920488).

Almost surely, 2^138327865 is an apocalyptic number.

It is an amenable number.

138327865 is a deficient number, since it is larger than the sum of its proper divisors (51127751).

138327865 is a wasteful number, since it uses less digits than its factorization.

138327865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489.

The product of its digits is 241920, while the sum is 43.

The square root of 138327865 is about 11761.2867068191. The cubic root of 138327865 is about 517.1738506725.

The spelling of 138327865 in words is "one hundred thirty-eight million, three hundred twenty-seven thousand, eight hundred sixty-five".