6421339 has 2 divisors, whose sum is σ = 6421340. Its totient is φ = 6421338.

The previous prime is 6421279. The next prime is 6421343. The reversal of 6421339 is 9331246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6421339 - 2⁷ = 6421211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6421369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210669 + 3210670.

It is an arithmetic number, because the mean of its divisors is an integer number (3210670).

Almost surely, 2^6421339 is an apocalyptic number.

6421339 is a deficient number, since it is larger than the sum of its proper divisors (1).

6421339 is an equidigital number, since it uses as much as digits as its factorization.

6421339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 6421339 is about 2534.0361086614. The cubic root of 6421339 is about 185.8696720659.

The spelling of 6421339 in words is "six million, four hundred twenty-one thousand, three hundred thirty-nine".