678873 has 16 divisors (see below), whose sum is σ = 990080. Its totient is φ = 413712.

The previous prime is 678871. The next prime is 678883. The reversal of 678873 is 378876.

It is not a de Polignac number, because 678873 - 2¹ = 678871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6540 + ... + 6642.

It is an arithmetic number, because the mean of its divisors is an integer number (61880).

2⁶⁷⁸⁸⁷³ is an apocalyptic number.

It is an amenable number.

678873 is a deficient number, since it is larger than the sum of its proper divisors (311207).

678873 is a wasteful number, since it uses less digits than its factorization.

678873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 119 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 678873 is about 823.9374976295. The cubic root of 678873 is about 87.8879859227.

It can be divided in two parts, 678 and 873, that added together give a palindrome (1551).

The spelling of 678873 in words is "six hundred seventy-eight thousand, eight hundred seventy-three".