6825813 has 4 divisors (see below), whose sum is σ = 9101088. Its totient is φ = 4550540.

The previous prime is 6825811. The next prime is 6825827. The reversal of 6825813 is 3185286.

It is a happy number.

6825813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 6825813 - 2¹ = 6825811 is a prime.

It is a super-2 number, since 2×6825813² = 93183446221938, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6825811) 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, 1137633 + ... + 1137638.

It is an arithmetic number, because the mean of its divisors is an integer number (2275272).

Almost surely, 2^6825813 is an apocalyptic number.

It is an amenable number.

6825813 is a deficient number, since it is larger than the sum of its proper divisors (2275275).

6825813 is a wasteful number, since it uses less digits than its factorization.

6825813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275274.

The product of its digits is 11520, while the sum is 33.

The square root of 6825813 is about 2612.6256907563. The cubic root of 6825813 is about 189.6930686149.

The spelling of 6825813 in words is "six million, eight hundred twenty-five thousand, eight hundred thirteen".