159717 has 4 divisors (see below), whose sum is σ = 212960. Its totient is φ = 106476.

The previous prime is 159707. The next prime is 159721. The reversal of 159717 is 717951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 159717 - 2⁴ = 159701 is a prime.

It is a D-number.

It is a Duffinian number.

159717 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159707) 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, 26617 + ... + 26622.

It is an arithmetic number, because the mean of its divisors is an integer number (53240).

2¹⁵⁹⁷¹⁷ is an apocalyptic number.

It is an amenable number.

159717 is a deficient number, since it is larger than the sum of its proper divisors (53243).

159717 is an equidigital number, since it uses as much as digits as its factorization.

159717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53242.

The product of its digits is 2205, while the sum is 30.

The square root of 159717 is about 399.6460934377. The cubic root of 159717 is about 54.2563259345.

It can be divided in two parts, 159 and 717, that multiplied together give a triangular number (114003 = T₄₇₇).

The spelling of 159717 in words is "one hundred fifty-nine thousand, seven hundred seventeen".