208974855679 has 2 divisors, whose sum is σ = 208974855680. Its totient is φ = 208974855678.

The previous prime is 208974855631. The next prime is 208974855721. The reversal of 208974855679 is 976558479802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-208974855679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208974855619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104487427839 + 104487427840.

It is an arithmetic number, because the mean of its divisors is an integer number (104487427840).

Almost surely, 2^208974855679 is an apocalyptic number.

208974855679 is a deficient number, since it is larger than the sum of its proper divisors (1).

208974855679 is an equidigital number, since it uses as much as digits as its factorization.

208974855679 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 208974855679 in words is "two hundred eight billion, nine hundred seventy-four million, eight hundred fifty-five thousand, six hundred seventy-nine".