6891135321 has 16 divisors (see below), whose sum is σ = 10502098304. Its totient is φ = 3937296384.

The previous prime is 6891135247. The next prime is 6891135331. The reversal of 6891135321 is 1235311986.

It is not a de Polignac number, because 6891135321 - 2¹¹ = 6891133273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6891135321.

It is not an unprimeable number, because it can be changed into a prime (6891135331) 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, 210555 + ... + 241071.

It is an arithmetic number, because the mean of its divisors is an integer number (656381144).

Almost surely, 2^6891135321 is an apocalyptic number.

It is an amenable number.

6891135321 is a deficient number, since it is larger than the sum of its proper divisors (3610962983).

6891135321 is a wasteful number, since it uses less digits than its factorization.

6891135321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41280.

The product of its digits is 38880, while the sum is 39.

The square root of 6891135321 is about 83012.8623828862. The cubic root of 6891135321 is about 1902.9626283606.

The spelling of 6891135321 in words is "six billion, eight hundred ninety-one million, one hundred thirty-five thousand, three hundred twenty-one".