208508889 has 8 divisors (see below), whose sum is σ = 278547552. Its totient is φ = 138738080.

The previous prime is 208508879. The next prime is 208508897. The reversal of 208508889 is 988805802.

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 208508889 - 2⁷ = 208508761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (208508819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65139 + ... + 68264.

It is an arithmetic number, because the mean of its divisors is an integer number (34818444).

Almost surely, 2^208508889 is an apocalyptic number.

It is an amenable number.

208508889 is a deficient number, since it is larger than the sum of its proper divisors (70038663).

208508889 is a wasteful number, since it uses less digits than its factorization.

208508889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133927.

The product of its (nonzero) digits is 368640, while the sum is 48.

The square root of 208508889 is about 14439.8368758099. The cubic root of 208508889 is about 592.9820194046.

The spelling of 208508889 in words is "two hundred eight million, five hundred eight thousand, eight hundred eighty-nine".