6439543 has 4 divisors (see below), whose sum is σ = 7024968. Its totient is φ = 5854120.

The previous prime is 6439541. The next prime is 6439547. The reversal of 6439543 is 3459346.

It is a happy number.

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 6439543 - 2¹ = 6439541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6439499 and 6439508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439541) 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, 292696 + ... + 292717.

It is an arithmetic number, because the mean of its divisors is an integer number (1756242).

Almost surely, 2^6439543 is an apocalyptic number.

6439543 is a deficient number, since it is larger than the sum of its proper divisors (585425).

6439543 is a wasteful number, since it uses less digits than its factorization.

6439543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585424.

The product of its digits is 38880, while the sum is 34.

The square root of 6439543 is about 2537.6254648785. The cubic root of 6439543 is about 186.0451484034.

The spelling of 6439543 in words is "six million, four hundred thirty-nine thousand, five hundred forty-three".