208669 has 4 divisors (see below), whose sum is σ = 211680. Its totient is φ = 205660.

The previous prime is 208667. The next prime is 208673. The reversal of 208669 is 966802.

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 a cyclic number.

It is not a de Polignac number, because 208669 - 2¹ = 208667 is a prime.

It is a super-2 number, since 2×208669² = 87085503122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 208669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1399 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (52920).

2²⁰⁸⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

208669 is a deficient number, since it is larger than the sum of its proper divisors (3011).

208669 is an equidigital number, since it uses as much as digits as its factorization.

208669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 208669 is about 456.8030210058. The cubic root of 208669 is about 59.3133761381.

The spelling of 208669 in words is "two hundred eight thousand, six hundred sixty-nine".