678885659 has 2 divisors, whose sum is σ = 678885660. Its totient is φ = 678885658.

The previous prime is 678885643. The next prime is 678885661. The reversal of 678885659 is 956588876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678885659 - 2⁴ = 678885643 is a prime.

Together with 678885661, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (678885629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339442829 + 339442830.

It is an arithmetic number, because the mean of its divisors is an integer number (339442830).

Almost surely, 2^678885659 is an apocalyptic number.

678885659 is a deficient number, since it is larger than the sum of its proper divisors (1).

678885659 is an equidigital number, since it uses as much as digits as its factorization.

678885659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 62.

The square root of 678885659 is about 26055.4343467922. The cubic root of 678885659 is about 878.8853220414.

The spelling of 678885659 in words is "six hundred seventy-eight million, eight hundred eighty-five thousand, six hundred fifty-nine".