678593843 has 2 divisors, whose sum is σ = 678593844. Its totient is φ = 678593842.

The previous prime is 678593827. The next prime is 678593857. The reversal of 678593843 is 348395876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678593843 - 2⁴ = 678593827 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (678593803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339296921 + 339296922.

It is an arithmetic number, because the mean of its divisors is an integer number (339296922).

Almost surely, 2^678593843 is an apocalyptic number.

678593843 is a deficient number, since it is larger than the sum of its proper divisors (1).

678593843 is an equidigital number, since it uses as much as digits as its factorization.

678593843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 53.

The square root of 678593843 is about 26049.8338382417. The cubic root of 678593843 is about 878.7593756701.

The spelling of 678593843 in words is "six hundred seventy-eight million, five hundred ninety-three thousand, eight hundred forty-three".