678765679 has 2 divisors, whose sum is σ = 678765680. Its totient is φ = 678765678.

The previous prime is 678765623. The next prime is 678765683. The reversal of 678765679 is 976567876.

678765679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678765679 - 2¹⁵ = 678732911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678765379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339382839 + 339382840.

It is an arithmetic number, because the mean of its divisors is an integer number (339382840).

Almost surely, 2^678765679 is an apocalyptic number.

678765679 is a deficient number, since it is larger than the sum of its proper divisors (1).

678765679 is an equidigital number, since it uses as much as digits as its factorization.

678765679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 61.

The square root of 678765679 is about 26053.1318462867. The cubic root of 678765679 is about 878.8335436248.

The spelling of 678765679 in words is "six hundred seventy-eight million, seven hundred sixty-five thousand, six hundred seventy-nine".