209207199189 has 16 divisors (see below), whose sum is σ = 280297879040. Its totient is φ = 138795536880.

The previous prime is 209207199169. The next prime is 209207199191. The reversal of 209207199189 is 981991702902.

209207199189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 209207199189 - 2¹⁷ = 209207068117 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209207199169) 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 in 15 ways as a sum of consecutive naturals, for example, 350592 + ... + 735750.

It is an arithmetic number, because the mean of its divisors is an integer number (17518617440).

Almost surely, 2^209207199189 is an apocalyptic number.

It is an amenable number.

209207199189 is a deficient number, since it is larger than the sum of its proper divisors (71090679851).

209207199189 is a wasteful number, since it uses less digits than its factorization.

209207199189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386040.

The product of its (nonzero) digits is 1469664, while the sum is 57.

The spelling of 209207199189 in words is "two hundred nine billion, two hundred seven million, one hundred ninety-nine thousand, one hundred eighty-nine".