680845 has 8 divisors (see below), whose sum is σ = 891360. Its totient is φ = 495120.

The previous prime is 680831. The next prime is 680857. The reversal of 680845 is 548086.

680845 = T₃₆₄ + T₃₆₅ + ... + T₃₇₃.

680845 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 680845 - 2¹³ = 672653 is a prime.

It is an Ulam number.

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, 6135 + ... + 6244.

It is an arithmetic number, because the mean of its divisors is an integer number (111420).

2⁶⁸⁰⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

680845 is a deficient number, since it is larger than the sum of its proper divisors (210515).

680845 is a wasteful number, since it uses less digits than its factorization.

680845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12395.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 680845 is about 825.1333225607. The cubic root of 680845 is about 87.9730030823.

The spelling of 680845 in words is "six hundred eighty thousand, eight hundred forty-five".