6825643 has 8 divisors (see below), whose sum is σ = 7703280. Its totient is φ = 5990880.

The previous prime is 6825629. The next prime is 6825661. The reversal of 6825643 is 3465286.

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 a de Polignac number, because none of the positive numbers 2^k-6825643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6825599 and 6825608.

It is not an unprimeable number, because it can be changed into a prime (6825613) 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, 10380 + ... + 11017.

It is an arithmetic number, because the mean of its divisors is an integer number (962910).

Almost surely, 2^6825643 is an apocalyptic number.

6825643 is a deficient number, since it is larger than the sum of its proper divisors (877637).

6825643 is a wasteful number, since it uses less digits than its factorization.

6825643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21437.

The product of its digits is 34560, while the sum is 34.

The square root of 6825643 is about 2612.5931562339. The cubic root of 6825643 is about 189.6914938043.

The spelling of 6825643 in words is "six million, eight hundred twenty-five thousand, six hundred forty-three".