159663 has 8 divisors (see below), whose sum is σ = 243328. Its totient is φ = 91224.

The previous prime is 159631. The next prime is 159667. The reversal of 159663 is 366951.

It is a happy number.

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

It is not a de Polignac number, because 159663 - 2⁵ = 159631 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 159663.

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 159663.

It is not an unprimeable number, because it can be changed into a prime (159667) 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 7 ways as a sum of consecutive naturals, for example, 3781 + ... + 3822.

It is an arithmetic number, because the mean of its divisors is an integer number (30416).

2¹⁵⁹⁶⁶³ is an apocalyptic number.

159663 is a deficient number, since it is larger than the sum of its proper divisors (83665).

159663 is an equidigital number, since it uses as much as digits as its factorization.

159663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7613.

The product of its digits is 4860, while the sum is 30.

The square root of 159663 is about 399.5785279516. The cubic root of 159663 is about 54.2502105933.

The spelling of 159663 in words is "one hundred fifty-nine thousand, six hundred sixty-three".