6789421 has 2 divisors, whose sum is σ = 6789422. Its totient is φ = 6789420.

The previous prime is 6789407. The next prime is 6789427. The reversal of 6789421 is 1249876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6320196 + 469225 = 2514^2 + 685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6789421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6789427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3394710 + 3394711.

It is an arithmetic number, because the mean of its divisors is an integer number (3394711).

Almost surely, 2^6789421 is an apocalyptic number.

It is an amenable number.

6789421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6789421 is an equidigital number, since it uses as much as digits as its factorization.

6789421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 6789421 is about 2605.6517418872. The cubic root of 6789421 is about 189.3553498692.

The spelling of 6789421 in words is "six million, seven hundred eighty-nine thousand, four hundred twenty-one".