208974856579 has 2 divisors, whose sum is σ = 208974856580. Its totient is φ = 208974856578.

The previous prime is 208974856549. The next prime is 208974856759. The reversal of 208974856579 is 975658479802.

208974856579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (208974856759) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208974856579 - 2²³ = 208966467971 is a prime.

It is not a weakly prime, because it can be changed into another prime (208974856529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104487428289 + 104487428290.

It is an arithmetic number, because the mean of its divisors is an integer number (104487428290).

Almost surely, 2^208974856579 is an apocalyptic number.

208974856579 is a deficient number, since it is larger than the sum of its proper divisors (1).

208974856579 is an equidigital number, since it uses as much as digits as its factorization.

208974856579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 304819200, while the sum is 70.

The spelling of 208974856579 in words is "two hundred eight billion, nine hundred seventy-four million, eight hundred fifty-six thousand, five hundred seventy-nine".