22723 has 4 divisors (see below), whose sum is σ = 23488. Its totient is φ = 21960.

The previous prime is 22721. The next prime is 22727. The reversal of 22723 is 32722.

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: 32722 = 2 ⋅16361.

It is a cyclic number.

It is not a de Polignac number, because 22723 - 2¹ = 22721 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22697 and 22706.

It is not an unprimeable number, because it can be changed into a prime (22721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336 + ... + 397.

It is an arithmetic number, because the mean of its divisors is an integer number (5872).

2²²⁷²³ is an apocalyptic number.

22723 is a deficient number, since it is larger than the sum of its proper divisors (765).

22723 is an equidigital number, since it uses as much as digits as its factorization.

22723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764.

The product of its digits is 168, while the sum is 16.

The square root of 22723 is about 150.7415005896. The cubic root of 22723 is about 28.3240415514.

Subtracting 22723 from its reverse (32722), we obtain a palindrome (9999).

The spelling of 22723 in words is "twenty-two thousand, seven hundred twenty-three", and thus it is an iban number.