208623 has 8 divisors (see below), whose sum is σ = 280368. Its totient is φ = 137984.

The previous prime is 208609. The next prime is 208627. The reversal of 208623 is 326802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 208623 - 2⁵ = 208591 is a prime.

It is a super-2 number, since 2×208623² = 87047112258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 208623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415 + ... + 767.

It is an arithmetic number, because the mean of its divisors is an integer number (35046).

2²⁰⁸⁶²³ is an apocalyptic number.

208623 is a deficient number, since it is larger than the sum of its proper divisors (71745).

208623 is a wasteful number, since it uses less digits than its factorization.

208623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 208623 is about 456.7526683009. The cubic root of 208623 is about 59.3090173756.

The spelling of 208623 in words is "two hundred eight thousand, six hundred twenty-three".