208149189 has 8 divisors (see below), whose sum is σ = 277606560. Its totient is φ = 138728976.

The previous prime is 208149181. The next prime is 208149191. The reversal of 208149189 is 981941802.

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

It is not a de Polignac number, because 208149189 - 2³ = 208149181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208149189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208149181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8839 + ... + 22235.

It is an arithmetic number, because the mean of its divisors is an integer number (34700820).

Almost surely, 2^208149189 is an apocalyptic number.

It is an amenable number.

208149189 is a deficient number, since it is larger than the sum of its proper divisors (69457371).

208149189 is a wasteful number, since it uses less digits than its factorization.

208149189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18579.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 208149189 is about 14427.3763727159. The cubic root of 208149189 is about 592.6408374633.

It can be divided in two parts, 20814 and 9189, that added together give a palindrome (30003).

The spelling of 208149189 in words is "two hundred eight million, one hundred forty-nine thousand, one hundred eighty-nine".