680587 has 2 divisors, whose sum is σ = 680588. Its totient is φ = 680586.

The previous prime is 680569. The next prime is 680597. The reversal of 680587 is 785086.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680587 is a prime.

It is not a weakly prime, because it can be changed into another prime (680507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340293 + 340294.

It is an arithmetic number, because the mean of its divisors is an integer number (340294).

2⁶⁸⁰⁵⁸⁷ is an apocalyptic number.

680587 is a deficient number, since it is larger than the sum of its proper divisors (1).

680587 is an equidigital number, since it uses as much as digits as its factorization.

680587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 680587 is about 824.9769693755. The cubic root of 680587 is about 87.9618894894.

The spelling of 680587 in words is "six hundred eighty thousand, five hundred eighty-seven".