678716099 has 4 divisors (see below), whose sum is σ = 679020936. Its totient is φ = 678411264.

The previous prime is 678716083. The next prime is 678716141. The reversal of 678716099 is 990617876.

It is a happy number.

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 678716099 - 2⁴ = 678716083 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 678716099.

It is not an unprimeable number, because it can be changed into a prime (678716699) 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 3 ways as a sum of consecutive naturals, for example, 149054 + ... + 153539.

It is an arithmetic number, because the mean of its divisors is an integer number (169755234).

Almost surely, 2^678716099 is an apocalyptic number.

678716099 is a deficient number, since it is larger than the sum of its proper divisors (304837).

678716099 is a wasteful number, since it uses less digits than its factorization.

678716099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304836.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 678716099 is about 26052.1803118280. The cubic root of 678716099 is about 878.8121451612.

The spelling of 678716099 in words is "six hundred seventy-eight million, seven hundred sixteen thousand, ninety-nine".