208851113 has 2 divisors, whose sum is σ = 208851114. Its totient is φ = 208851112.

The previous prime is 208851077. The next prime is 208851151. The reversal of 208851113 is 311158802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208167184 + 683929 = 14428^2 + 827^2 .

It is a cyclic number.

It is not a de Polignac number, because 208851113 - 2¹² = 208847017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_11541539 and since 208851113 and 11541539 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (208851163) 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, 104425556 + 104425557.

It is an arithmetic number, because the mean of its divisors is an integer number (104425557).

Almost surely, 2^208851113 is an apocalyptic number.

It is an amenable number.

208851113 is a deficient number, since it is larger than the sum of its proper divisors (1).

208851113 is an equidigital number, since it uses as much as digits as its factorization.

208851113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 208851113 is about 14451.6820128316. The cubic root of 208851113 is about 593.3062609862.

The spelling of 208851113 in words is "two hundred eight million, eight hundred fifty-one thousand, one hundred thirteen".