680784559 has 12 divisors (see below), whose sum is σ = 842493936. Its totient is φ = 538641792.

The previous prime is 680784529. The next prime is 680784593. The reversal of 680784559 is 955487086.

It is not a de Polignac number, because 680784559 - 2⁹ = 680784047 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 (680784529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 286554 + ... + 288919.

It is an arithmetic number, because the mean of its divisors is an integer number (70207828).

Almost surely, 2^680784559 is an apocalyptic number.

680784559 is a deficient number, since it is larger than the sum of its proper divisors (161709377).

680784559 is a wasteful number, since it uses less digits than its factorization.

680784559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575506 (or 575493 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 52.

The square root of 680784559 is about 26091.8485163470. The cubic root of 680784559 is about 879.7039978118.

The spelling of 680784559 in words is "six hundred eighty million, seven hundred eighty-four thousand, five hundred fifty-nine".