6439047 has 8 divisors (see below), whose sum is σ = 8768256. Its totient is φ = 4201272.

The previous prime is 6439033. The next prime is 6439049. The reversal of 6439047 is 7409346.

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

It is not a de Polignac number, because 6439047 - 2⁶ = 6438983 is a prime.

It is a super-2 number, since 2×6439047² = 82922652536418, which contains 22 as substring.

6439047 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6438999 and 6439017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439049) 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, 22693 + ... + 22974.

It is an arithmetic number, because the mean of its divisors is an integer number (1096032).

Almost surely, 2^6439047 is an apocalyptic number.

6439047 is a deficient number, since it is larger than the sum of its proper divisors (2329209).

6439047 is a wasteful number, since it uses less digits than its factorization.

6439047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45717.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 6439047 is about 2537.5277338386. The cubic root of 6439047 is about 186.0403716274.

Subtracting 6439047 from its reverse (7409346), we obtain a cube (970299 = 99³).

The spelling of 6439047 in words is "six million, four hundred thirty-nine thousand, forty-seven".