208432564189 has 2 divisors, whose sum is σ = 208432564190. Its totient is φ = 208432564188.

The previous prime is 208432564187. The next prime is 208432564201. The reversal of 208432564189 is 981465234802.

It is a happy number.

208432564189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109107999225 + 99324564964 = 330315^2 + 315158^2 .

It is a cyclic number.

It is not a de Polignac number, because 208432564189 - 2¹ = 208432564187 is a prime.

Together with 208432564187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208432564187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104216282094 + 104216282095.

It is an arithmetic number, because the mean of its divisors is an integer number (104216282095).

Almost surely, 2^208432564189 is an apocalyptic number.

It is an amenable number.

208432564189 is a deficient number, since it is larger than the sum of its proper divisors (1).

208432564189 is an equidigital number, since it uses as much as digits as its factorization.

208432564189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 208432564189 in words is "two hundred eight billion, four hundred thirty-two million, five hundred sixty-four thousand, one hundred eighty-nine".