138843807321 has 8 divisors (see below), whose sum is σ = 190128457024. Its totient is φ = 90060847920.

The previous prime is 138843807301. The next prime is 138843807343. The reversal of 138843807321 is 123708348831.

138843807321 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 138843807321 - 2¹⁴ = 138843790937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138843807301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625422445 + ... + 625422666.

It is an arithmetic number, because the mean of its divisors is an integer number (23766057128).

Almost surely, 2^138843807321 is an apocalyptic number.

It is an amenable number.

138843807321 is a deficient number, since it is larger than the sum of its proper divisors (51284649703).

138843807321 is a wasteful number, since it uses less digits than its factorization.

138843807321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250845151.

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 138843807321 in words is "one hundred thirty-eight billion, eight hundred forty-three million, eight hundred seven thousand, three hundred twenty-one".