193840312321 has 4 divisors (see below), whose sum is σ = 205242683652. Its totient is φ = 182437940992.

The previous prime is 193840312297. The next prime is 193840312327. The reversal of 193840312321 is 123213048391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84527421696 + 109312890625 = 290736^2 + 330625^2 .

It is a cyclic number.

It is not a de Polignac number, because 193840312321 - 2⁹ = 193840311809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193840312327) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5701185640 + ... + 5701185673.

It is an arithmetic number, because the mean of its divisors is an integer number (51310670913).

Almost surely, 2^193840312321 is an apocalyptic number.

It is an amenable number.

193840312321 is a deficient number, since it is larger than the sum of its proper divisors (11402371331).

193840312321 is a wasteful number, since it uses less digits than its factorization.

193840312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11402371330.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 193840312321 in words is "one hundred ninety-three billion, eight hundred forty million, three hundred twelve thousand, three hundred twenty-one".