16869 has 4 divisors (see below), whose sum is σ = 22496. Its totient is φ = 11244.

The previous prime is 16843. The next prime is 16871. The reversal of 16869 is 96861.

16869 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 16869 - 2⁷ = 16741 is a prime.

It is a super-2 number, since 2×16869² = 569126322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16829) 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 3 ways as a sum of consecutive naturals, for example, 2809 + ... + 2814.

It is an arithmetic number, because the mean of its divisors is an integer number (5624).

2¹⁶⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

16869 is a deficient number, since it is larger than the sum of its proper divisors (5627).

16869 is an equidigital number, since it uses as much as digits as its factorization.

16869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626.

The product of its digits is 2592, while the sum is 30.

The square root of 16869 is about 129.8807145037. The cubic root of 16869 is about 25.6465988825.

The spelling of 16869 in words is "sixteen thousand, eight hundred sixty-nine".