208117164 has 12 divisors (see below), whose sum is σ = 485606744. Its totient is φ = 69372384.

The previous prime is 208117163. The next prime is 208117171. The reversal of 208117164 is 461711802.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (208117163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8671537 + ... + 8671560.

Almost surely, 2^208117164 is an apocalyptic number.

It is an amenable number.

208117164 is an abundant number, since it is smaller than the sum of its proper divisors (277489580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208117164 is a wasteful number, since it uses less digits than its factorization.

208117164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17343104 (or 17343102 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 208117164 is about 14426.2664608692. The cubic root of 208117164 is about 592.6104421230.

Adding to 208117164 its reverse (461711802), we get a palindrome (669828966).

The spelling of 208117164 in words is "two hundred eight million, one hundred seventeen thousand, one hundred sixty-four".