159817 has 12 divisors (see below), whose sum is σ = 196480. Its totient is φ = 127296.

The previous prime is 159811. The next prime is 159833. The reversal of 159817 is 718951.

It is not a de Polignac number, because 159817 - 2¹¹ = 157769 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

Its product of digits (2520) is a multiple of the sum of its prime factors (120).

It is not an unprimeable number, because it can be changed into a prime (159811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1984 + ... + 2062.

2¹⁵⁹⁸¹⁷ is an apocalyptic number.

159817 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

159817 is a deficient number, since it is larger than the sum of its proper divisors (36663).

159817 is an equidigital number, since it uses as much as digits as its factorization.

159817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 103 counting only the distinct ones).

The product of its digits is 2520, while the sum is 31.

The square root of 159817 is about 399.7711845544. The cubic root of 159817 is about 54.2676470017.

The spelling of 159817 in words is "one hundred fifty-nine thousand, eight hundred seventeen".