678713 has 4 divisors (see below), whose sum is σ = 775680. Its totient is φ = 581748.

The previous prime is 678659. The next prime is 678719. The reversal of 678713 is 317876.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 678713 - 2⁶ = 678649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 678713.

It is not an unprimeable number, because it can be changed into a prime (678719) 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, 48473 + ... + 48486.

It is an arithmetic number, because the mean of its divisors is an integer number (193920).

2⁶⁷⁸⁷¹³ is an apocalyptic number.

It is an amenable number.

678713 is a deficient number, since it is larger than the sum of its proper divisors (96967).

678713 is an equidigital number, since it uses as much as digits as its factorization.

678713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96966.

The product of its digits is 7056, while the sum is 32.

The square root of 678713 is about 823.8403971644. The cubic root of 678713 is about 87.8810807615.

The spelling of 678713 in words is "six hundred seventy-eight thousand, seven hundred thirteen".