23573 has 4 divisors (see below), whose sum is σ = 25728. Its totient is φ = 21420.

The previous prime is 23567. The next prime is 23581. The reversal of 23573 is 37532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23573 - 2⁴ = 23557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23563) 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, 1061 + ... + 1082.

It is an arithmetic number, because the mean of its divisors is an integer number (6432).

2²³⁵⁷³ is an apocalyptic number.

It is an amenable number.

23573 is a deficient number, since it is larger than the sum of its proper divisors (2155).

23573 is a wasteful number, since it uses less digits than its factorization.

23573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154.

The product of its digits is 630, while the sum is 20.

The square root of 23573 is about 153.5350122936. The cubic root of 23573 is about 28.6728999125.

The spelling of 23573 in words is "twenty-three thousand, five hundred seventy-three".