6393389 has 4 divisors (see below), whose sum is σ = 6418524. Its totient is φ = 6368256.

The previous prime is 6393383. The next prime is 6393397. The reversal of 6393389 is 9833936.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2941225 + 3452164 = 1715^2 + 1858^2 .

It is a cyclic number.

It is not a de Polignac number, because 6393389 - 2²⁰ = 5344813 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 (6393383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12182 + ... + 12695.

It is an arithmetic number, because the mean of its divisors is an integer number (1604631).

Almost surely, 2^6393389 is an apocalyptic number.

It is an amenable number.

6393389 is a deficient number, since it is larger than the sum of its proper divisors (25135).

6393389 is a wasteful number, since it uses less digits than its factorization.

6393389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25134.

The product of its digits is 104976, while the sum is 41.

The square root of 6393389 is about 2528.5151769369. The cubic root of 6393389 is about 185.5996031037.

The spelling of 6393389 in words is "six million, three hundred ninety-three thousand, three hundred eighty-nine".