6439229 has 4 divisors (see below), whose sum is σ = 6447420. Its totient is φ = 6431040.

The previous prime is 6439219. The next prime is 6439259. The reversal of 6439229 is 9229346.

6439229 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1932100 + 4507129 = 1390^2 + 2123^2 .

It is a cyclic number.

It is not a de Polignac number, because 6439229 - 2⁸ = 6438973 is a prime.

It is a super-2 number, since 2×6439229² = 82927340228882, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6⁸ + 4¹¹ + 3⁵ + 9³ + 2⁷ + 2¹⁵ + 9⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2774 + ... + 4535.

It is an arithmetic number, because the mean of its divisors is an integer number (1611855).

Almost surely, 2^6439229 is an apocalyptic number.

It is an amenable number.

6439229 is a deficient number, since it is larger than the sum of its proper divisors (8191).

6439229 is an equidigital number, since it uses as much as digits as its factorization.

6439229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8190.

The product of its digits is 23328, while the sum is 35.

The square root of 6439229 is about 2537.5635952622. The cubic root of 6439229 is about 186.0421244245.

It can be divided in two parts, 64 and 39229, that added together give a palindrome (39293).

The spelling of 6439229 in words is "six million, four hundred thirty-nine thousand, two hundred twenty-nine".