678709339 has 24 divisors (see below), whose sum is σ = 867585600. Its totient is φ = 525001680.

The previous prime is 678709337. The next prime is 678709349. The reversal of 678709339 is 933907876.

It is not a de Polignac number, because 678709339 - 2¹ = 678709337 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (678709337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70392 + ... + 79450.

It is an arithmetic number, because the mean of its divisors is an integer number (36149400).

Almost surely, 2^678709339 is an apocalyptic number.

678709339 is a deficient number, since it is larger than the sum of its proper divisors (188876261).

678709339 is a wasteful number, since it uses less digits than its factorization.

678709339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9223 (or 9216 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 52.

The square root of 678709339 is about 26052.0505718840. The cubic root of 678709339 is about 878.8092275005.

It can be divided in two parts, 678 and 709339, that added together give a palindrome (710017).

The spelling of 678709339 in words is "six hundred seventy-eight million, seven hundred nine thousand, three hundred thirty-nine".