6403389 has 4 divisors (see below), whose sum is σ = 8537856. Its totient is φ = 4268924.

The previous prime is 6403387. The next prime is 6403393. The reversal of 6403389 is 9833046.

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 6403389 - 2¹ = 6403387 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067229 + ... + 1067234.

It is an arithmetic number, because the mean of its divisors is an integer number (2134464).

Almost surely, 2^6403389 is an apocalyptic number.

It is an amenable number.

6403389 is a deficient number, since it is larger than the sum of its proper divisors (2134467).

6403389 is a wasteful number, since it uses less digits than its factorization.

6403389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134466.

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

The square root of 6403389 is about 2530.4918494237. The cubic root of 6403389 is about 185.6963191129.

The spelling of 6403389 in words is "six million, four hundred three thousand, three hundred eighty-nine".