678913306 has 4 divisors (see below), whose sum is σ = 1018369962. Its totient is φ = 339456652.

The previous prime is 678913297. The next prime is 678913307. The reversal of 678913306 is 603319876.

678913306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 531072025 + 147841281 = 23045^2 + 12159^2 .

It is not an unprimeable number, because it can be changed into a prime (678913307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169728325 + ... + 169728328.

Almost surely, 2^678913306 is an apocalyptic number.

678913306 is a deficient number, since it is larger than the sum of its proper divisors (339456656).

678913306 is a wasteful number, since it uses less digits than its factorization.

678913306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339456655.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 678913306 is about 26055.9648833046. The cubic root of 678913306 is about 878.8972524808.

The spelling of 678913306 in words is "six hundred seventy-eight million, nine hundred thirteen thousand, three hundred six".