680005 has 8 divisors (see below), whose sum is σ = 820512. Its totient is φ = 541008.

The previous prime is 680003. The next prime is 680027. The reversal of 680005 is 500086.

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 680005 - 2¹ = 680003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1314 + ... + 1756.

It is an arithmetic number, because the mean of its divisors is an integer number (102564).

2⁶⁸⁰⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

680005 is a deficient number, since it is larger than the sum of its proper divisors (140507).

680005 is a wasteful number, since it uses less digits than its factorization.

680005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 680005 is about 824.6241568133. The cubic root of 680005 is about 87.9368089735.

The spelling of 680005 in words is "six hundred eighty thousand, five".