678887743 has 2 divisors, whose sum is σ = 678887744. Its totient is φ = 678887742.

The previous prime is 678887731. The next prime is 678887749. The reversal of 678887743 is 347788876.

678887743 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-678887743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678887749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339443871 + 339443872.

It is an arithmetic number, because the mean of its divisors is an integer number (339443872).

Almost surely, 2^678887743 is an apocalyptic number.

678887743 is a deficient number, since it is larger than the sum of its proper divisors (1).

678887743 is an equidigital number, since it uses as much as digits as its factorization.

678887743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12644352, while the sum is 58.

The square root of 678887743 is about 26055.4743384188. The cubic root of 678887743 is about 878.8862213559.

The spelling of 678887743 in words is "six hundred seventy-eight million, eight hundred eighty-seven thousand, seven hundred forty-three".