6403039 has 4 divisors (see below), whose sum is σ = 6681456. Its totient is φ = 6124624.

The previous prime is 6403031. The next prime is 6403051. The reversal of 6403039 is 9303046.

6403039 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 is not a de Polignac number, because 6403039 - 2³ = 6403031 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 (6403031) 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, 139174 + ... + 139219.

It is an arithmetic number, because the mean of its divisors is an integer number (1670364).

Almost surely, 2^6403039 is an apocalyptic number.

6403039 is a deficient number, since it is larger than the sum of its proper divisors (278417).

6403039 is a wasteful number, since it uses less digits than its factorization.

6403039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278416.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 6403039 is about 2530.4226919627. The cubic root of 6403039 is about 185.6929357536.

The spelling of 6403039 in words is "six million, four hundred three thousand, thirty-nine".