208369 has 12 divisors (see below), whose sum is σ = 255424. Its totient is φ = 166464.

The previous prime is 208367. The next prime is 208379. The reversal of 208369 is 963802.

208369 is nontrivially palindromic in base 15.

It is not a de Polignac number, because 208369 - 2¹ = 208367 is a prime.

It is a super-2 number, since 2×208369² = 86835280322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208367) 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 11 ways as a sum of consecutive naturals, for example, 1972 + ... + 2074.

2²⁰⁸³⁶⁹ is an apocalyptic number.

208369 is the 289-th heptagonal number.

It is an amenable number.

208369 is a deficient number, since it is larger than the sum of its proper divisors (47055).

208369 is a wasteful number, since it uses less digits than its factorization.

208369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 208369 is about 456.4745337913. The cubic root of 208369 is about 59.2849378825.

The spelling of 208369 in words is "two hundred eight thousand, three hundred sixty-nine".