6391189321 has 16 divisors (see below), whose sum is σ = 7486328448. Its totient is φ = 5391366400.

The previous prime is 6391189303. The next prime is 6391189327. The reversal of 6391189321 is 1239811936.

It is not a de Polignac number, because 6391189321 - 2⁵ = 6391189289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6391189327) 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, 227410 + ... + 253963.

It is an arithmetic number, because the mean of its divisors is an integer number (467895528).

Almost surely, 2^6391189321 is an apocalyptic number.

It is an amenable number.

6391189321 is a deficient number, since it is larger than the sum of its proper divisors (1095139127).

6391189321 is a wasteful number, since it uses less digits than its factorization.

6391189321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481472.

The product of its digits is 69984, while the sum is 43.

The square root of 6391189321 is about 79944.9142910292. The cubic root of 6391189321 is about 1855.7831515666.

The spelling of 6391189321 in words is "six billion, three hundred ninety-one million, one hundred eighty-nine thousand, three hundred twenty-one".