208466187859 has 2 divisors, whose sum is σ = 208466187860. Its totient is φ = 208466187858.

The previous prime is 208466187857. The next prime is 208466187871. The reversal of 208466187859 is 958781664802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208466187859 - 2¹ = 208466187857 is a prime.

Together with 208466187857, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 208466187859.

It is not a weakly prime, because it can be changed into another prime (208466187851) 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, 104233093929 + 104233093930.

It is an arithmetic number, because the mean of its divisors is an integer number (104233093930).

Almost surely, 2^208466187859 is an apocalyptic number.

208466187859 is a deficient number, since it is larger than the sum of its proper divisors (1).

208466187859 is an equidigital number, since it uses as much as digits as its factorization.

208466187859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 208466187859 in words is "two hundred eight billion, four hundred sixty-six million, one hundred eighty-seven thousand, eight hundred fifty-nine".