6823643 has 4 divisors (see below), whose sum is σ = 6935568. Its totient is φ = 6711720.

The previous prime is 6823573. The next prime is 6823657. The reversal of 6823643 is 3463286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3463286 = 2 ⋅1731643.

It is a cyclic number.

It is not a de Polignac number, because 6823643 - 2¹⁰ = 6822619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6823693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55871 + ... + 55992.

It is an arithmetic number, because the mean of its divisors is an integer number (1733892).

Almost surely, 2^6823643 is an apocalyptic number.

6823643 is a deficient number, since it is larger than the sum of its proper divisors (111925).

6823643 is a wasteful number, since it uses less digits than its factorization.

6823643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111924.

The product of its digits is 20736, while the sum is 32.

The square root of 6823643 is about 2612.2103667201. The cubic root of 6823643 is about 189.6729646562.

The spelling of 6823643 in words is "six million, eight hundred twenty-three thousand, six hundred forty-three".