678807079 has 2 divisors, whose sum is σ = 678807080. Its totient is φ = 678807078.

The previous prime is 678807013. The next prime is 678807113. The reversal of 678807079 is 970708876.

It is a happy number.

678807079 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 678807079 - 2¹¹ = 678805031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678817079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339403539 + 339403540.

It is an arithmetic number, because the mean of its divisors is an integer number (339403540).

Almost surely, 2^678807079 is an apocalyptic number.

678807079 is a deficient number, since it is larger than the sum of its proper divisors (1).

678807079 is an equidigital number, since it uses as much as digits as its factorization.

678807079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1185408, while the sum is 52.

The square root of 678807079 is about 26053.9263643697. The cubic root of 678807079 is about 878.8514108457.

The spelling of 678807079 in words is "six hundred seventy-eight million, eight hundred seven thousand, seventy-nine".