678843 has 12 divisors (see below), whose sum is σ = 1069848. Its totient is φ = 411360.

The previous prime is 678833. The next prime is 678859. The reversal of 678843 is 348876.

It is not a de Polignac number, because 678843 - 2⁶ = 678779 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678798 and 678807.

It is not an unprimeable number, because it can be changed into a prime (678823) 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 11 ways as a sum of consecutive naturals, for example, 3330 + ... + 3527.

It is an arithmetic number, because the mean of its divisors is an integer number (89154).

2⁶⁷⁸⁸⁴³ is an apocalyptic number.

678843 is a deficient number, since it is larger than the sum of its proper divisors (391005).

678843 is a wasteful number, since it uses less digits than its factorization.

678843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6874 (or 6871 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 678843 is about 823.9192921640. The cubic root of 678843 is about 87.8866912876.

It can be divided in two parts, 678 and 843, that added together give a square (1521 = 39²).

The spelling of 678843 in words is "six hundred seventy-eight thousand, eight hundred forty-three".