16969 has 4 divisors (see below), whose sum is σ = 17280. Its totient is φ = 16660.

The previous prime is 16963. The next prime is 16979. The reversal of 16969 is 96961.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96961 = 47 ⋅2063.

It is a cyclic number.

It is not a de Polignac number, because 16969 - 2⁵ = 16937 is a prime.

It is a super-2 number, since 2×16969² = 575893922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

16969 is a lucky number.

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 16969.

It is not an unprimeable number, because it can be changed into a prime (16963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49 + ... + 190.

It is an arithmetic number, because the mean of its divisors is an integer number (4320).

2¹⁶⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

16969 is a deficient number, since it is larger than the sum of its proper divisors (311).

16969 is an equidigital number, since it uses as much as digits as its factorization.

16969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310.

The product of its digits is 2916, while the sum is 31.

The square root of 16969 is about 130.2651142862. The cubic root of 16969 is about 25.6971770381.

The spelling of 16969 in words is "sixteen thousand, nine hundred sixty-nine".