6438613 has 4 divisors (see below), whose sum is σ = 6455808. Its totient is φ = 6421420.

The previous prime is 6438583. The next prime is 6438617. The reversal of 6438613 is 3168346.

6438613 is nontrivially palindromic in base 3.

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 a cyclic number.

It is not a de Polignac number, because 6438613 - 2⁵ = 6438581 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438617) 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 3 ways as a sum of consecutive naturals, for example, 8023 + ... + 8788.

It is an arithmetic number, because the mean of its divisors is an integer number (1613952).

Almost surely, 2^6438613 is an apocalyptic number.

It is an amenable number.

6438613 is a deficient number, since it is larger than the sum of its proper divisors (17195).

6438613 is a wasteful number, since it uses less digits than its factorization.

6438613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17194.

The product of its digits is 10368, while the sum is 31.

The square root of 6438613 is about 2537.4422160908. The cubic root of 6438613 is about 186.0361917472.

The spelling of 6438613 in words is "six million, four hundred thirty-eight thousand, six hundred thirteen".