6441887 has 2 divisors, whose sum is σ = 6441888. Its totient is φ = 6441886.

The previous prime is 6441871. The next prime is 6441889. The reversal of 6441887 is 7881446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6441887 - 2⁴ = 6441871 is a prime.

Together with 6441889, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6441887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6441889) 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, 3220943 + 3220944.

It is an arithmetic number, because the mean of its divisors is an integer number (3220944).

Almost surely, 2^6441887 is an apocalyptic number.

6441887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6441887 is an equidigital number, since it uses as much as digits as its factorization.

6441887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 38.

The square root of 6441887 is about 2538.0872719432. The cubic root of 6441887 is about 186.0677192042.

The spelling of 6441887 in words is "six million, four hundred forty-one thousand, eight hundred eighty-seven".