159709 has 4 divisors (see below), whose sum is σ = 174240. Its totient is φ = 145180.

The previous prime is 159707. The next prime is 159721. The reversal of 159709 is 907951.

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 a cyclic number.

It is not a de Polignac number, because 159709 - 2¹ = 159707 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7249 + ... + 7270.

It is an arithmetic number, because the mean of its divisors is an integer number (43560).

2¹⁵⁹⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

159709 is a deficient number, since it is larger than the sum of its proper divisors (14531).

159709 is a wasteful number, since it uses less digits than its factorization.

159709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14530.

The product of its (nonzero) digits is 2835, while the sum is 31.

The square root of 159709 is about 399.6360844568. The cubic root of 159709 is about 54.2554200450.

It can be divided in two parts, 159 and 709, that added together give a palindrome (868).

The spelling of 159709 in words is "one hundred fifty-nine thousand, seven hundred nine".