678545807 has 2 divisors, whose sum is σ = 678545808. Its totient is φ = 678545806.

The previous prime is 678545767. The next prime is 678545821. The reversal of 678545807 is 708545876.

678545807 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 a de Polignac number, because none of the positive numbers 2^k-678545807 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678545867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339272903 + 339272904.

It is an arithmetic number, because the mean of its divisors is an integer number (339272904).

Almost surely, 2^678545807 is an apocalyptic number.

678545807 is a deficient number, since it is larger than the sum of its proper divisors (1).

678545807 is an equidigital number, since it uses as much as digits as its factorization.

678545807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1881600, while the sum is 50.

The square root of 678545807 is about 26048.9118198822. The cubic root of 678545807 is about 878.7386401045.

The spelling of 678545807 in words is "six hundred seventy-eight million, five hundred forty-five thousand, eight hundred seven".