6439937 has 8 divisors (see below), whose sum is σ = 7376256. Its totient is φ = 5507712.

The previous prime is 6439933. The next prime is 6439949. The reversal of 6439937 is 7399346.

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

It is not a de Polignac number, because 6439937 - 2² = 6439933 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 4³ + 3⁷ + 9⁵ + 9⁷ + 3¹³ + 7² .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6439894 and 6439903.

It is not an unprimeable number, because it can be changed into a prime (6439933) 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, 4028 + ... + 5394.

It is an arithmetic number, because the mean of its divisors is an integer number (922032).

Almost surely, 2^6439937 is an apocalyptic number.

It is an amenable number.

6439937 is a deficient number, since it is larger than the sum of its proper divisors (936319).

6439937 is a wasteful number, since it uses less digits than its factorization.

6439937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047.

The product of its digits is 122472, while the sum is 41.

The square root of 6439937 is about 2537.7030953206. The cubic root of 6439937 is about 186.0489426837.

The spelling of 6439937 in words is "six million, four hundred thirty-nine thousand, nine hundred thirty-seven".