6818839399 has 8 divisors (see below), whose sum is σ = 6847007040. Its totient is φ = 6790694400.

The previous prime is 6818839381. The next prime is 6818839429. The reversal of 6818839399 is 9939388186.

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 6818839399 - 2⁵ = 6818839367 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 6818839399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6818879399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 865719 + ... + 873559.

It is an arithmetic number, because the mean of its divisors is an integer number (855875880).

Almost surely, 2^6818839399 is an apocalyptic number.

6818839399 is a deficient number, since it is larger than the sum of its proper divisors (28167641).

6818839399 is a wasteful number, since it uses less digits than its factorization.

6818839399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11321.

The product of its digits is 20155392, while the sum is 64.

The square root of 6818839399 is about 82576.2641380681. The cubic root of 6818839399 is about 1896.2844654358.

The spelling of 6818839399 in words is "six billion, eight hundred eighteen million, eight hundred thirty-nine thousand, three hundred ninety-nine".