678328559 has 4 divisors (see below), whose sum is σ = 694873200. Its totient is φ = 661783920.

The previous prime is 678328529. The next prime is 678328571. The reversal of 678328559 is 955823876.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 678328559 - 2⁸ = 678328303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 678328559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678328529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8272259 + ... + 8272340.

It is an arithmetic number, because the mean of its divisors is an integer number (173718300).

Almost surely, 2^678328559 is an apocalyptic number.

678328559 is a deficient number, since it is larger than the sum of its proper divisors (16544641).

678328559 is a wasteful number, since it uses less digits than its factorization.

678328559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16544640.

The product of its digits is 3628800, while the sum is 53.

The square root of 678328559 is about 26044.7414846068. The cubic root of 678328559 is about 878.6448490455.

The spelling of 678328559 in words is "six hundred seventy-eight million, three hundred twenty-eight thousand, five hundred fifty-nine".