159688 has 8 divisors (see below), whose sum is σ = 299430. Its totient is φ = 79840.

The previous prime is 159683. The next prime is 159697. The reversal of 159688 is 886951.

It can be written as a sum of positive squares in only one way, i.e., 101124 + 58564 = 318^2 + 242^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (159683) by changing a digit.

159688 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 as a sum of consecutive naturals, namely, 9973 + ... + 9988.

2¹⁵⁹⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

159688 is a deficient number, since it is larger than the sum of its proper divisors (139742).

159688 is a wasteful number, since it uses less digits than its factorization.

159688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19967 (or 19963 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 159688 is about 399.6098096894. The cubic root of 159688 is about 54.2530419412.

The spelling of 159688 in words is "one hundred fifty-nine thousand, six hundred eighty-eight".