678811079 has 8 divisors (see below), whose sum is σ = 683773440. Its totient is φ = 673859736.

The previous prime is 678811031. The next prime is 678811117. The reversal of 678811079 is 970118876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678811079 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 (678811019) 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 7 ways as a sum of consecutive naturals, for example, 151262 + ... + 155684.

It is an arithmetic number, because the mean of its divisors is an integer number (85471680).

Almost surely, 2^678811079 is an apocalyptic number.

678811079 is a deficient number, since it is larger than the sum of its proper divisors (4962361).

678811079 is a wasteful number, since it uses less digits than its factorization.

678811079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509.

The product of its (nonzero) digits is 169344, while the sum is 47.

The square root of 678811079 is about 26054.0031281183. The cubic root of 678811079 is about 878.8531371087.

The spelling of 678811079 in words is "six hundred seventy-eight million, eight hundred eleven thousand, seventy-nine".