208994289 has 16 divisors (see below), whose sum is σ = 325244928. Its totient is φ = 116883792.

The previous prime is 208994273. The next prime is 208994293. The reversal of 208994289 is 982499802.

It is not a de Polignac number, because 208994289 - 2⁴ = 208994273 is a prime.

It is a super-2 number, since 2×208994289² = 87357225669231042, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (208996289) 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, 104887 + ... + 106860.

It is an arithmetic number, because the mean of its divisors is an integer number (20327808).

Almost surely, 2^208994289 is an apocalyptic number.

It is an amenable number.

208994289 is a deficient number, since it is larger than the sum of its proper divisors (116250639).

208994289 is a wasteful number, since it uses less digits than its factorization.

208994289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211804.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 208994289 is about 14456.6347743865. The cubic root of 208994289 is about 593.4418086047.

The spelling of 208994289 in words is "two hundred eight million, nine hundred ninety-four thousand, two hundred eighty-nine".