321871323889 has 8 divisors (see below), whose sum is σ = 322310638440. Its totient is φ = 321432249600.

The previous prime is 321871323869. The next prime is 321871323973. The reversal of 321871323889 is 988323178123.

It can be written as a sum of positive squares in 4 ways, for example, as 88466389489 + 233404934400 = 297433^2 + 483120^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 321871323889 - 2⁹ = 321871323377 is a prime.

It is a super-2 number, since 2×321871323889² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321871323869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2707479 + ... + 2823859.

It is an arithmetic number, because the mean of its divisors is an integer number (40288829805).

Almost surely, 2^321871323889 is an apocalyptic number.

It is an amenable number.

321871323889 is a deficient number, since it is larger than the sum of its proper divisors (439314551).

321871323889 is a wasteful number, since it uses less digits than its factorization.

321871323889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120131.

The product of its digits is 3483648, while the sum is 55.

The spelling of 321871323889 in words is "three hundred twenty-one billion, eight hundred seventy-one million, three hundred twenty-three thousand, eight hundred eighty-nine".