159687 has 12 divisors (see below), whose sum is σ = 251784. Its totient is φ = 96720.

The previous prime is 159683. The next prime is 159697. The reversal of 159687 is 786951.

It is not a de Polignac number, because 159687 - 2² = 159683 is a prime.

It is a congruent number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 708 + ... + 905.

It is an arithmetic number, because the mean of its divisors is an integer number (20982).

2¹⁵⁹⁶⁸⁷ is an apocalyptic number.

159687 is a deficient number, since it is larger than the sum of its proper divisors (92097).

159687 is a wasteful number, since it uses less digits than its factorization.

159687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1627 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 159687 is about 399.6085584669. The cubic root of 159687 is about 54.2529286929.

Subtracting 159687 from its reverse (786951), we obtain a square (627264 = 792²).

The spelling of 159687 in words is "one hundred fifty-nine thousand, six hundred eighty-seven".