209106329989 has 2 divisors, whose sum is σ = 209106329990. Its totient is φ = 209106329988.

The previous prime is 209106329983. The next prime is 209106330019. The reversal of 209106329989 is 989923601902.

209106329989 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., 116482277025 + 92624052964 = 341295^2 + 304342^2 .

It is a cyclic number.

It is not a de Polignac number, because 209106329989 - 2¹⁵ = 209106297221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209106329983) 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, 104553164994 + 104553164995.

It is an arithmetic number, because the mean of its divisors is an integer number (104553164995).

Almost surely, 2^209106329989 is an apocalyptic number.

It is an amenable number.

209106329989 is a deficient number, since it is larger than the sum of its proper divisors (1).

209106329989 is an equidigital number, since it uses as much as digits as its factorization.

209106329989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The spelling of 209106329989 in words is "two hundred nine billion, one hundred six million, three hundred twenty-nine thousand, nine hundred eighty-nine".