6813863 has 4 divisors (see below), whose sum is σ = 7787280. Its totient is φ = 5840448.

The previous prime is 6813857. The next prime is 6813881. The reversal of 6813863 is 3683186.

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 6813863 - 2⁴ = 6813847 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 (6813853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486698 + ... + 486711.

It is an arithmetic number, because the mean of its divisors is an integer number (1946820).

Almost surely, 2^6813863 is an apocalyptic number.

6813863 is a deficient number, since it is larger than the sum of its proper divisors (973417).

6813863 is an equidigital number, since it uses as much as digits as its factorization.

6813863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973416.

The product of its digits is 20736, while the sum is 35.

The square root of 6813863 is about 2610.3377176143. The cubic root of 6813863 is about 189.5823049442.

It can be divided in two parts, 68 and 13863, that added together give a palindrome (13931).

The spelling of 6813863 in words is "six million, eight hundred thirteen thousand, eight hundred sixty-three".