6394399 has 8 divisors (see below), whose sum is σ = 7004880. Its totient is φ = 5788800.

The previous prime is 6394373. The next prime is 6394433. The reversal of 6394399 is 9934936.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6394399 - 2¹³ = 6386207 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6394099) 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 7 ways as a sum of consecutive naturals, for example, 1879 + ... + 4039.

It is an arithmetic number, because the mean of its divisors is an integer number (875610).

Almost surely, 2^6394399 is an apocalyptic number.

6394399 is a deficient number, since it is larger than the sum of its proper divisors (610481).

6394399 is a wasteful number, since it uses less digits than its factorization.

6394399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441.

The product of its digits is 157464, while the sum is 43.

The square root of 6394399 is about 2528.7148910069. The cubic root of 6394399 is about 185.6093759972.

The spelling of 6394399 in words is "six million, three hundred ninety-four thousand, three hundred ninety-nine".