6439613 has 4 divisors (see below), whose sum is σ = 6778560. Its totient is φ = 6100668.

The previous prime is 6439607. The next prime is 6439619. The reversal of 6439613 is 3169346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (6439607) and next prime (6439619).

It is a cyclic number.

It is not a de Polignac number, because 6439613 - 2⁸ = 6439357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6439613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169445 + ... + 169482.

It is an arithmetic number, because the mean of its divisors is an integer number (1694640).

Almost surely, 2^6439613 is an apocalyptic number.

It is an amenable number.

6439613 is a deficient number, since it is larger than the sum of its proper divisors (338947).

6439613 is a wasteful number, since it uses less digits than its factorization.

6439613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338946.

The product of its digits is 11664, while the sum is 32.

The square root of 6439613 is about 2537.6392572625. The cubic root of 6439613 is about 186.0458225254.

The spelling of 6439613 in words is "six million, four hundred thirty-nine thousand, six hundred thirteen".