6826321 has 2 divisors, whose sum is σ = 6826322. Its totient is φ = 6826320.

The previous prime is 6826319. The next prime is 6826349. The reversal of 6826321 is 1236286.

It is an a-pointer prime, because the next prime (6826349) can be obtained adding 6826321 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5107600 + 1718721 = 2260^2 + 1311^2 .

It is a cyclic number.

It is not a de Polignac number, because 6826321 - 2¹ = 6826319 is a prime.

Together with 6826319, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6826321.

It is not a weakly prime, because it can be changed into another prime (6826361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3413160 + 3413161.

It is an arithmetic number, because the mean of its divisors is an integer number (3413161).

Almost surely, 2^6826321 is an apocalyptic number.

It is an amenable number.

6826321 is a deficient number, since it is larger than the sum of its proper divisors (1).

6826321 is an equidigital number, since it uses as much as digits as its factorization.

6826321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 6826321 is about 2612.7229091505. The cubic root of 6826321 is about 189.6977743639.

The spelling of 6826321 in words is "six million, eight hundred twenty-six thousand, three hundred twenty-one".