6689843 has 4 divisors (see below), whose sum is σ = 7041960. Its totient is φ = 6337728.

The previous prime is 6689821. The next prime is 6689869. The reversal of 6689843 is 3489866.

6689843 is nontrivially palindromic in base 2.

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 6689843 - 2⁶ = 6689779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6689794 and 6689803.

It is not an unprimeable number, because it can be changed into a prime (6689873) 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, 176030 + ... + 176067.

It is an arithmetic number, because the mean of its divisors is an integer number (1760490).

Almost surely, 2^6689843 is an apocalyptic number.

6689843 is a deficient number, since it is larger than the sum of its proper divisors (352117).

6689843 is a wasteful number, since it uses less digits than its factorization.

6689843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352116.

The product of its digits is 248832, while the sum is 44.

The square root of 6689843 is about 2586.4730812440. The cubic root of 6689843 is about 188.4250511749.

The spelling of 6689843 in words is "six million, six hundred eighty-nine thousand, eight hundred forty-three".