208922689 has 16 divisors (see below), whose sum is σ = 224224000. Its totient is φ = 194088960.

The previous prime is 208922687. The next prime is 208922719. The reversal of 208922689 is 986229802.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 208922689 - 2¹ = 208922687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208922687) 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, 271297 + ... + 272065.

It is an arithmetic number, because the mean of its divisors is an integer number (14014000).

Almost surely, 2^208922689 is an apocalyptic number.

It is an amenable number.

208922689 is a deficient number, since it is larger than the sum of its proper divisors (15301311).

208922689 is a wasteful number, since it uses less digits than its factorization.

208922689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048.

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 208922689 is about 14454.1581906384. The cubic root of 208922689 is about 593.3740311758.

The spelling of 208922689 in words is "two hundred eight million, nine hundred twenty-two thousand, six hundred eighty-nine".