208343661 has 8 divisors (see below), whose sum is σ = 278037504. Its totient is φ = 138772800.

The previous prime is 208343623. The next prime is 208343677. The reversal of 208343661 is 166343802.

208343661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-208343661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208343561) 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, 26716 + ... + 33621.

It is an arithmetic number, because the mean of its divisors is an integer number (34754688).

Almost surely, 2^208343661 is an apocalyptic number.

It is an amenable number.

208343661 is a deficient number, since it is larger than the sum of its proper divisors (69693843).

208343661 is a wasteful number, since it uses less digits than its factorization.

208343661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61491.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 208343661 is about 14434.1144861748. The cubic root of 208343661 is about 592.8253464287.

The spelling of 208343661 in words is "two hundred eight million, three hundred forty-three thousand, six hundred sixty-one".