6439253 has 4 divisors (see below), whose sum is σ = 6446880. Its totient is φ = 6431628.

The previous prime is 6439219. The next prime is 6439259. The reversal of 6439253 is 3529346.

6439253 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, 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 6439253 - 2⁸ = 6438997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6439259) 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, 2363 + ... + 4296.

It is an arithmetic number, because the mean of its divisors is an integer number (1611720).

Almost surely, 2^6439253 is an apocalyptic number.

It is an amenable number.

6439253 is a deficient number, since it is larger than the sum of its proper divisors (7627).

6439253 is an equidigital number, since it uses as much as digits as its factorization.

6439253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7626.

The product of its digits is 19440, while the sum is 32.

The square root of 6439253 is about 2537.5683242033. The cubic root of 6439253 is about 186.0423555601.

The spelling of 6439253 in words is "six million, four hundred thirty-nine thousand, two hundred fifty-three".