6439073 has 16 divisors (see below), whose sum is σ = 7264080. Its totient is φ = 5677056.

The previous prime is 6439067. The next prime is 6439123. The reversal of 6439073 is 3709346.

It can be written as a sum of positive squares in 8 ways, for example, as 717409 + 5721664 = 847^2 + 2392^2 .

It is a cyclic number.

It is not a de Polignac number, because 6439073 - 2²² = 2244769 is a prime.

It is a super-2 number, since 2×6439073² = 82923322198658, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6439003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18065 + ... + 18417.

It is an arithmetic number, because the mean of its divisors is an integer number (454005).

Almost surely, 2^6439073 is an apocalyptic number.

It is an amenable number.

6439073 is a deficient number, since it is larger than the sum of its proper divisors (825007).

6439073 is a wasteful number, since it uses less digits than its factorization.

6439073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 6439073 is about 2537.5328569301. The cubic root of 6439073 is about 186.0406220290.

The spelling of 6439073 in words is "six million, four hundred thirty-nine thousand, seventy-three".