663223 has 4 divisors (see below), whose sum is σ = 723528. Its totient is φ = 602920.

The previous prime is 663209. The next prime is 663239. The reversal of 663223 is 322366.

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

It is a cyclic number.

It is not a de Polignac number, because 663223 - 2⁵ = 663191 is a prime.

It is a Smith number, since the sum of its digits (22) 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 junction number, because it is equal to n+sod(n) for n = 663194 and 663203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663203) 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, 30136 + ... + 30157.

It is an arithmetic number, because the mean of its divisors is an integer number (180882).

2⁶⁶³²²³ is an apocalyptic number.

663223 is a deficient number, since it is larger than the sum of its proper divisors (60305).

663223 is a wasteful number, since it uses less digits than its factorization.

663223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60304.

The product of its digits is 1296, while the sum is 22.

The square root of 663223 is about 814.3850440670. The cubic root of 663223 is about 87.2073707402.

Adding to 663223 its reverse (322366), we get a palindrome (985589).

The spelling of 663223 in words is "six hundred sixty-three thousand, two hundred twenty-three".