680305 has 8 divisors (see below), whose sum is σ = 820800. Its totient is φ = 541296.

The previous prime is 680299. The next prime is 680321. The reversal of 680305 is 503086.

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

It is a cyclic number.

It is not a de Polignac number, because 680305 - 2³ = 680297 is a prime.

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, 1606 + ... + 1984.

It is an arithmetic number, because the mean of its divisors is an integer number (102600).

2⁶⁸⁰³⁰⁵ is an apocalyptic number.

It is an amenable number.

680305 is a deficient number, since it is larger than the sum of its proper divisors (140495).

680305 is a wasteful number, since it uses less digits than its factorization.

680305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 680305 is about 824.8060378053. The cubic root of 680305 is about 87.9497388608.

The spelling of 680305 in words is "six hundred eighty thousand, three hundred five".