16573 has 2 divisors, whose sum is σ = 16574.
Its totient is φ = 16572.
The previous prime is 16567. The next prime is 16603. The reversal of 16573 is 37561.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 15129 + 1444 = 123^2 + 38^2
It is an emirp because it is prime and its reverse (37561) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 16573 - 29 = 16061 is a prime.
16573 is a lucky number.
It is a nialpdrome in base 12.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (16553) 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 as a sum of consecutive naturals, namely, 8286 + 8287.
It is an arithmetic number, because the mean of its divisors is an integer number (8287).
216573 is an apocalyptic number.
It is an amenable number.
16573 is a deficient number, since it is larger than the sum of its proper divisors (1).
16573 is an equidigital number, since it uses as much as digits as its factorization.
16573 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 630, while the sum is 22.
The square root of 16573 is about 128.7361643051.
The cubic root of 16573 is about 25.4957060564.
The spelling of 16573 in words is "sixteen thousand, five hundred seventy-three".