817223 has 4 divisors (see below), whose sum is σ = 891528. Its totient is φ = 742920.

The previous prime is 817211. The next prime is 817237. The reversal of 817223 is 322718.

817223 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-817223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37136 + ... + 37157.

It is an arithmetic number, because the mean of its divisors is an integer number (222882).

2⁸¹⁷²²³ is an apocalyptic number.

817223 is a deficient number, since it is larger than the sum of its proper divisors (74305).

817223 is a wasteful number, since it uses less digits than its factorization.

817223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74304.

The product of its digits is 672, while the sum is 23.

The square root of 817223 is about 904.0038716731. The cubic root of 817223 is about 93.4932363777.

The spelling of 817223 in words is "eight hundred seventeen thousand, two hundred twenty-three".