159669 has 12 divisors (see below), whose sum is σ = 234156. Its totient is φ = 104832.

The previous prime is 159667. The next prime is 159671. The reversal of 159669 is 966951.

159669 is a `hidden beast` number, since 1 + 596 + 69 = 666.

It is an interprime number because it is at equal distance from previous prime (159667) and next prime (159671).

It can be written as a sum of positive squares in 2 ways, for example, as 19044 + 140625 = 138^2 + 375^2 .

It is not a de Polignac number, because 159669 - 2¹ = 159667 is a prime.

It is a super-2 number, since 2×159669² = 50988379122, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 939 + ... + 1095.

It is an arithmetic number, because the mean of its divisors is an integer number (19513).

2¹⁵⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

159669 is a deficient number, since it is larger than the sum of its proper divisors (74487).

159669 is a wasteful number, since it uses less digits than its factorization.

159669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 273 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 159669 is about 399.5860357920. The cubic root of 159669 is about 54.2508901437.

It can be divided in two parts, 159 and 669, that added together give a palindrome (828).

The spelling of 159669 in words is "one hundred fifty-nine thousand, six hundred sixty-nine".