6856943 has 4 divisors (see below), whose sum is σ = 6891600. Its totient is φ = 6822288.

The previous prime is 6856937. The next prime is 6856973. The reversal of 6856943 is 3496586.

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 6856943 - 2¹⁸ = 6594799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6856943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6856973) 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, 17030 + ... + 17427.

It is an arithmetic number, because the mean of its divisors is an integer number (1722900).

Almost surely, 2^6856943 is an apocalyptic number.

6856943 is a deficient number, since it is larger than the sum of its proper divisors (34657).

6856943 is a wasteful number, since it uses less digits than its factorization.

6856943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34656.

The product of its digits is 155520, while the sum is 41.

The square root of 6856943 is about 2618.5765217003. The cubic root of 6856943 is about 189.9810045645.

The spelling of 6856943 in words is "six million, eight hundred fifty-six thousand, nine hundred forty-three".