208238689 has 8 divisors (see below), whose sum is σ = 222793280. Its totient is φ = 194043600.

The previous prime is 208238683. The next prime is 208238699. The reversal of 208238689 is 986832802.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 208238689 - 2¹³ = 208230497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208238683) 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 7 ways as a sum of consecutive naturals, for example, 88677 + ... + 90994.

It is an arithmetic number, because the mean of its divisors is an integer number (27849160).

Almost surely, 2^208238689 is an apocalyptic number.

It is an amenable number.

208238689 is a deficient number, since it is larger than the sum of its proper divisors (14554591).

208238689 is a wasteful number, since it uses less digits than its factorization.

208238689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179751.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 208238689 is about 14430.4777814180. The cubic root of 208238689 is about 592.7257665387.

The spelling of 208238689 in words is "two hundred eight million, two hundred thirty-eight thousand, six hundred eighty-nine".