191608 has 16 divisors (see below), whose sum is σ = 368280. Its totient is φ = 93408.

The previous prime is 191599. The next prime is 191621. The reversal of 191608 is 806191.

It is a congruent number.

It is an unprimeable number.

191608 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66 + ... + 622.

2¹⁹¹⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

191608 is a deficient number, since it is larger than the sum of its proper divisors (176672).

191608 is a wasteful number, since it uses less digits than its factorization.

191608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 191608 is about 437.7305107026. The cubic root of 191608 is about 57.6506948242.

Adding to 191608 its reverse (806191), we get a palindrome (997799).

The spelling of 191608 in words is "one hundred ninety-one thousand, six hundred eight".