6443671 has 4 divisors (see below), whose sum is σ = 6939352. Its totient is φ = 5947992.

The previous prime is 6443639. The next prime is 6443677. The reversal of 6443671 is 1763446.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6443671 - 2⁵ = 6443639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247821 + ... + 247846.

It is an arithmetic number, because the mean of its divisors is an integer number (1734838).

Almost surely, 2^6443671 is an apocalyptic number.

6443671 is a deficient number, since it is larger than the sum of its proper divisors (495681).

6443671 is a wasteful number, since it uses less digits than its factorization.

6443671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495680.

The product of its digits is 12096, while the sum is 31.

The square root of 6443671 is about 2538.4386933704. The cubic root of 6443671 is about 186.0848939944.

The spelling of 6443671 in words is "six million, four hundred forty-three thousand, six hundred seventy-one".