6868321 has 4 divisors (see below), whose sum is σ = 6888132. Its totient is φ = 6848512.

The previous prime is 6868319. The next prime is 6868363. The reversal of 6868321 is 1238686.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4260096 + 2608225 = 2064^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 6868321 - 2¹ = 6868319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6868021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9376 + ... + 10081.

It is an arithmetic number, because the mean of its divisors is an integer number (1722033).

Almost surely, 2^6868321 is an apocalyptic number.

It is an amenable number.

6868321 is a deficient number, since it is larger than the sum of its proper divisors (19811).

6868321 is a wasteful number, since it uses less digits than its factorization.

6868321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19810.

The product of its digits is 13824, while the sum is 34.

The square root of 6868321 is about 2620.7481756170. The cubic root of 6868321 is about 190.0860275249.

The spelling of 6868321 in words is "six million, eight hundred sixty-eight thousand, three hundred twenty-one".