678683 has 4 divisors (see below), whose sum is σ = 700608. Its totient is φ = 656760.

The previous prime is 678659. The next prime is 678719. The reversal of 678683 is 386876.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678683 is a prime.

It is a super-2 number, since 2×678683² = 921221228978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10916 + ... + 10977.

It is an arithmetic number, because the mean of its divisors is an integer number (175152).

2⁶⁷⁸⁶⁸³ is an apocalyptic number.

678683 is a deficient number, since it is larger than the sum of its proper divisors (21925).

678683 is a wasteful number, since it uses less digits than its factorization.

678683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21924.

The product of its digits is 48384, while the sum is 38.

The square root of 678683 is about 823.8221895531. The cubic root of 678683 is about 87.8797859229.

The spelling of 678683 in words is "six hundred seventy-eight thousand, six hundred eighty-three".