6828321 has 4 divisors (see below), whose sum is σ = 9104432. Its totient is φ = 4552212.

The previous prime is 6828317. The next prime is 6828323. The reversal of 6828321 is 1238286.

6828321 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6828321 - 2² = 6828317 is a prime.

It is a D-number.

It is a Duffinian number.

6828321 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6828323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1138051 + ... + 1138056.

It is an arithmetic number, because the mean of its divisors is an integer number (2276108).

Almost surely, 2^6828321 is an apocalyptic number.

It is an amenable number.

6828321 is a deficient number, since it is larger than the sum of its proper divisors (2276111).

6828321 is a wasteful number, since it uses less digits than its factorization.

6828321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276110.

The product of its digits is 4608, while the sum is 30.

The square root of 6828321 is about 2613.1056235828. The cubic root of 6828321 is about 189.7162986663.

The spelling of 6828321 in words is "six million, eight hundred twenty-eight thousand, three hundred twenty-one".