6438871 has 2 divisors, whose sum is σ = 6438872. Its totient is φ = 6438870.

The previous prime is 6438833. The next prime is 6438877. The reversal of 6438871 is 1788346.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6438871 is a prime.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 6438871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6438877) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219435 + 3219436.

It is an arithmetic number, because the mean of its divisors is an integer number (3219436).

Almost surely, 2^6438871 is an apocalyptic number.

6438871 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438871 is an equidigital number, since it uses as much as digits as its factorization.

6438871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 6438871 is about 2537.4930541777. The cubic root of 6438871 is about 186.0386765834.

The spelling of 6438871 in words is "six million, four hundred thirty-eight thousand, eight hundred seventy-one".