6438903 has 16 divisors (see below), whose sum is σ = 9144576. Its totient is φ = 4016000.

The previous prime is 6438893. The next prime is 6438911. The reversal of 6438903 is 3098346.

It is not a de Polignac number, because 6438903 - 2⁵ = 6438871 is a prime.

6438903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12550 + ... + 13052.

It is an arithmetic number, because the mean of its divisors is an integer number (571536).

Almost surely, 2^6438903 is an apocalyptic number.

6438903 is a deficient number, since it is larger than the sum of its proper divisors (2705673).

6438903 is a wasteful number, since it uses less digits than its factorization.

6438903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6438903 is about 2537.4993596058. The cubic root of 6438903 is about 186.0389847756.

The spelling of 6438903 in words is "six million, four hundred thirty-eight thousand, nine hundred three".