6441439 has 2 divisors, whose sum is σ = 6441440. Its totient is φ = 6441438.

The previous prime is 6441433. The next prime is 6441467. The reversal of 6441439 is 9341446.

6441439 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6441439 is a prime.

6441439 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6441439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6441433) 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, 3220719 + 3220720.

It is an arithmetic number, because the mean of its divisors is an integer number (3220720).

Almost surely, 2^6441439 is an apocalyptic number.

6441439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6441439 is an equidigital number, since it uses as much as digits as its factorization.

6441439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 6441439 is about 2537.9990149722. Note that the first 3 decimals coincide. The cubic root of 6441439 is about 186.0634057543.

The spelling of 6441439 in words is "six million, four hundred forty-one thousand, four hundred thirty-nine".