6439934 has 4 divisors (see below), whose sum is σ = 9659904. Its totient is φ = 3219966.

The previous prime is 6439933. The next prime is 6439949. The reversal of 6439934 is 4399346.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439933) 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, 1609982 + ... + 1609985.

It is an arithmetic number, because the mean of its divisors is an integer number (2414976).

Almost surely, 2^6439934 is an apocalyptic number.

6439934 is a deficient number, since it is larger than the sum of its proper divisors (3219970).

6439934 is a wasteful number, since it uses less digits than its factorization.

6439934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219969.

The product of its digits is 69984, while the sum is 38.

The square root of 6439934 is about 2537.7025042349. The cubic root of 6439934 is about 186.0489137938.

The spelling of 6439934 in words is "six million, four hundred thirty-nine thousand, nine hundred thirty-four".