223723 has 4 divisors (see below), whose sum is σ = 224680. Its totient is φ = 222768.

The previous prime is 223711. The next prime is 223747. The reversal of 223723 is 327322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 327322 = 2 ⋅163661.

It is a cyclic number.

It is not a de Polignac number, because 223723 - 2⁹ = 223211 is a prime.

It is a super-3 number, since 3×223723³ = 33593337853902201, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223723.

It is not an unprimeable number, because it can be changed into a prime (223753) 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, 136 + ... + 682.

It is an arithmetic number, because the mean of its divisors is an integer number (56170).

2²²³⁷²³ is an apocalyptic number.

223723 is a deficient number, since it is larger than the sum of its proper divisors (957).

223723 is an equidigital number, since it uses as much as digits as its factorization.

223723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956.

The product of its digits is 504, while the sum is 19.

The square root of 223723 is about 472.9936574628. The cubic root of 223723 is about 60.7067353273.

It can be divided in two parts, 223 and 723, that added together give a triangular number (946 = T₄₃).

The spelling of 223723 in words is "two hundred twenty-three thousand, seven hundred twenty-three", and thus it is an iban number.