208965189 has 16 divisors (see below), whose sum is σ = 292228992. Its totient is φ = 132568128.

The previous prime is 208965179. The next prime is 208965209. The reversal of 208965189 is 981569802.

It is a happy number.

It is not a de Polignac number, because 208965189 - 2⁸ = 208964933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208965179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5907 + ... + 21279.

It is an arithmetic number, because the mean of its divisors is an integer number (18264312).

Almost surely, 2^208965189 is an apocalyptic number.

It is an amenable number.

208965189 is a deficient number, since it is larger than the sum of its proper divisors (83263803).

208965189 is a wasteful number, since it uses less digits than its factorization.

208965189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15596.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 208965189 is about 14455.6282810537. The cubic root of 208965189 is about 593.4142640591.

The spelling of 208965189 in words is "two hundred eight million, nine hundred sixty-five thousand, one hundred eighty-nine".