680539 has 2 divisors, whose sum is σ = 680540. Its totient is φ = 680538.

The previous prime is 680531. The next prime is 680567. The reversal of 680539 is 935086.

680539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680539 - 2³ = 680531 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 680539.

It is not a weakly prime, because it can be changed into another prime (680531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340269 + 340270.

It is an arithmetic number, because the mean of its divisors is an integer number (340270).

2⁶⁸⁰⁵³⁹ is an apocalyptic number.

680539 is a deficient number, since it is larger than the sum of its proper divisors (1).

680539 is an equidigital number, since it uses as much as digits as its factorization.

680539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 680539 is about 824.9478771413. The cubic root of 680539 is about 87.9598215344.

The spelling of 680539 in words is "six hundred eighty thousand, five hundred thirty-nine".