159639 has 8 divisors (see below), whose sum is σ = 215040. Its totient is φ = 105336.

The previous prime is 159631. The next prime is 159667. The reversal of 159639 is 936951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 159639 - 2³ = 159631 is a prime.

It is a super-2 number, since 2×159639² = 50969220642, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 159639.

It is not an unprimeable number, because it can be changed into a prime (159631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172 + ... + 590.

It is an arithmetic number, because the mean of its divisors is an integer number (26880).

2¹⁵⁹⁶³⁹ is an apocalyptic number.

159639 is a deficient number, since it is larger than the sum of its proper divisors (55401).

159639 is a wasteful number, since it uses less digits than its factorization.

159639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549.

The product of its digits is 7290, while the sum is 33.

The square root of 159639 is about 399.5484951792. The cubic root of 159639 is about 54.2474922213.

The spelling of 159639 in words is "one hundred fifty-nine thousand, six hundred thirty-nine".