208108906 has 8 divisors (see below), whose sum is σ = 319423104. Its totient is φ = 101634540.

The previous prime is 208108867. The next prime is 208108909. The reversal of 208108906 is 609801802.

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

It is not an unprimeable number, because it can be changed into a prime (208108909) 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 3 ways as a sum of consecutive naturals, for example, 1209850 + ... + 1210021.

It is an arithmetic number, because the mean of its divisors is an integer number (39927888).

Almost surely, 2^208108906 is an apocalyptic number.

208108906 is a deficient number, since it is larger than the sum of its proper divisors (111314198).

208108906 is a wasteful number, since it uses less digits than its factorization.

208108906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419916.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 208108906 is about 14425.9802439904. The cubic root of 208108906 is about 592.6026038431.

The spelling of 208108906 in words is "two hundred eight million, one hundred eight thousand, nine hundred six".