6439432843 has 8 divisors (see below), whose sum is σ = 6727004928. Its totient is φ = 6152493864.

The previous prime is 6439432807. The next prime is 6439432847. The reversal of 6439432843 is 3482349346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6439432843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6439432793 and 6439432802.

It is not an unprimeable number, because it can be changed into a prime (6439432847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137421 + ... + 178222.

It is an arithmetic number, because the mean of its divisors is an integer number (840875616).

Almost surely, 2^6439432843 is an apocalyptic number.

6439432843 is a deficient number, since it is larger than the sum of its proper divisors (287572085).

6439432843 is a wasteful number, since it uses less digits than its factorization.

6439432843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316553.

The product of its digits is 1492992, while the sum is 46.

The square root of 6439432843 is about 80246.0768075300. The cubic root of 6439432843 is about 1860.4408754695.

The spelling of 6439432843 in words is "six billion, four hundred thirty-nine million, four hundred thirty-two thousand, eight hundred forty-three".