208723 has 4 divisors (see below), whose sum is σ = 215488. Its totient is φ = 201960.

The previous prime is 208721. The next prime is 208729. The reversal of 208723 is 327802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327802 = 2 ⋅163901.

It is a cyclic number.

It is not a de Polignac number, because 208723 - 2¹ = 208721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208694 and 208703.

It is not an unprimeable number, because it can be changed into a prime (208721) 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, 3336 + ... + 3397.

It is an arithmetic number, because the mean of its divisors is an integer number (53872).

2²⁰⁸⁷²³ is an apocalyptic number.

208723 is a deficient number, since it is larger than the sum of its proper divisors (6765).

208723 is an equidigital number, since it uses as much as digits as its factorization.

208723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6764.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 208723 is about 456.8621236216. The cubic root of 208723 is about 59.3184921289.

The spelling of 208723 in words is "two hundred eight thousand, seven hundred twenty-three".