6789643 has 8 divisors (see below), whose sum is σ = 7775712. Its totient is φ = 5807616.

The previous prime is 6789637. The next prime is 6789701. The reversal of 6789643 is 3469876.

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-6789643 is a prime.

6789643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 6789643.

It is not an unprimeable number, because it can be changed into a prime (6789143) 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, 4971 + ... + 6187.

It is an arithmetic number, because the mean of its divisors is an integer number (971964).

Almost surely, 2^6789643 is an apocalyptic number.

6789643 is a deficient number, since it is larger than the sum of its proper divisors (986069).

6789643 is a wasteful number, since it uses less digits than its factorization.

6789643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021.

The product of its digits is 217728, while the sum is 43.

The square root of 6789643 is about 2605.6943412457. The cubic root of 6789643 is about 189.3574136893.

The spelling of 6789643 in words is "six million, seven hundred eighty-nine thousand, six hundred forty-three".