6438834403 has 4 divisors (see below), whose sum is σ = 6527037688. Its totient is φ = 6350631120.

The previous prime is 6438834401. The next prime is 6438834497. The reversal of 6438834403 is 3044388346.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6438834403 - 2¹ = 6438834401 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6438834403.

It is not an unprimeable number, because it can be changed into a prime (6438834401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44101533 + ... + 44101678.

It is an arithmetic number, because the mean of its divisors is an integer number (1631759422).

Almost surely, 2^6438834403 is an apocalyptic number.

6438834403 is a deficient number, since it is larger than the sum of its proper divisors (88203285).

6438834403 is an equidigital number, since it uses as much as digits as its factorization.

6438834403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88203284.

The product of its (nonzero) digits is 663552, while the sum is 43.

The square root of 6438834403 is about 80242.3479404734. The cubic root of 6438834403 is about 1860.3832411635.

The spelling of 6438834403 in words is "six billion, four hundred thirty-eight million, eight hundred thirty-four thousand, four hundred three".