201688 has 16 divisors (see below), whose sum is σ = 400680. Its totient is φ = 94848.

The previous prime is 201683. The next prime is 201701. The reversal of 201688 is 886102.

201688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201683) by changing a digit.

201688 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, 606 + ... + 877.

2²⁰¹⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

201688 is a deficient number, since it is larger than the sum of its proper divisors (198992).

201688 is a wasteful number, since it uses less digits than its factorization.

201688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 201688 is about 449.0968715099. The cubic root of 201688 is about 58.6444187909.

The spelling of 201688 in words is "two hundred one thousand, six hundred eighty-eight".