208944143189 has 2 divisors, whose sum is σ = 208944143190. Its totient is φ = 208944143188.

The previous prime is 208944143101. The next prime is 208944143197. The reversal of 208944143189 is 981341449802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128873820100 + 80070323089 = 358990^2 + 282967^2 .

It is a cyclic number.

It is not a de Polignac number, because 208944143189 - 2¹⁶ = 208944077653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 208944143189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208944143489) 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, 104472071594 + 104472071595.

It is an arithmetic number, because the mean of its divisors is an integer number (104472071595).

Almost surely, 2^208944143189 is an apocalyptic number.

It is an amenable number.

208944143189 is a deficient number, since it is larger than the sum of its proper divisors (1).

208944143189 is an equidigital number, since it uses as much as digits as its factorization.

208944143189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 53.

The spelling of 208944143189 in words is "two hundred eight billion, nine hundred forty-four million, one hundred forty-three thousand, one hundred eighty-nine".