208242661 has 8 divisors (see below), whose sum is σ = 227646144. Its totient is φ = 188917920.

The previous prime is 208242659. The next prime is 208242677. The reversal of 208242661 is 166242802.

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 208242661 - 2¹ = 208242659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208242961) 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, 14080 + ... + 24793.

It is an arithmetic number, because the mean of its divisors is an integer number (28455768).

Almost surely, 2^208242661 is an apocalyptic number.

It is an amenable number.

208242661 is a deficient number, since it is larger than the sum of its proper divisors (19403483).

208242661 is a wasteful number, since it uses less digits than its factorization.

208242661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39371.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 208242661 is about 14430.6154061426. The cubic root of 208242661 is about 592.7295351176.

The spelling of 208242661 in words is "two hundred eight million, two hundred forty-two thousand, six hundred sixty-one".