208598666113 has 2 divisors, whose sum is σ = 208598666114. Its totient is φ = 208598666112.

The previous prime is 208598666053. The next prime is 208598666123. The reversal of 208598666113 is 311666895802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140492281329 + 68106384784 = 374823^2 + 260972^2 .

It is a cyclic number.

It is not a de Polignac number, because 208598666113 - 2³³ = 200008731521 is a prime.

It is a super-4 number, since 4×208598666113⁴ (a number of 46 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (208598666123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104299333056 + 104299333057.

It is an arithmetic number, because the mean of its divisors is an integer number (104299333057).

Almost surely, 2^208598666113 is an apocalyptic number.

It is an amenable number.

208598666113 is a deficient number, since it is larger than the sum of its proper divisors (1).

208598666113 is an equidigital number, since it uses as much as digits as its factorization.

208598666113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 208598666113 in words is "two hundred eight billion, five hundred ninety-eight million, six hundred sixty-six thousand, one hundred thirteen".