6439423 has 8 divisors (see below), whose sum is σ = 6923520. Its totient is φ = 5969880.

The previous prime is 6439397. The next prime is 6439427. The reversal of 6439423 is 3249346.

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

It is a cyclic number.

It is not a de Polignac number, because 6439423 - 2⁹ = 6438911 is a prime.

It is a d-powerful number, because it can be written as 6⁸ + 4³ + 3⁹ + 9 + 4¹⁰ + 2²¹ + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439427) 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 in 7 ways as a sum of consecutive naturals, for example, 2713 + ... + 4498.

It is an arithmetic number, because the mean of its divisors is an integer number (865440).

Almost surely, 2^6439423 is an apocalyptic number.

6439423 is a deficient number, since it is larger than the sum of its proper divisors (484097).

6439423 is a wasteful number, since it uses less digits than its factorization.

6439423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7277.

The product of its digits is 15552, while the sum is 31.

The square root of 6439423 is about 2537.6018206173. The cubic root of 6439423 is about 186.0439927543.

The spelling of 6439423 in words is "six million, four hundred thirty-nine thousand, four hundred twenty-three".