680605 has 8 divisors (see below), whose sum is σ = 843264. Its totient is φ = 526800.

The previous prime is 680597. The next prime is 680611. The reversal of 680605 is 506086.

680605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 680605 - 2³ = 680597 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 680605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2041 + ... + 2350.

It is an arithmetic number, because the mean of its divisors is an integer number (105408).

2⁶⁸⁰⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

680605 is a deficient number, since it is larger than the sum of its proper divisors (162659).

680605 is a wasteful number, since it uses less digits than its factorization.

680605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 680605 is about 824.9878786988. The cubic root of 680605 is about 87.9626649475.

The spelling of 680605 in words is "six hundred eighty thousand, six hundred five".