16493 has 2 divisors, whose sum is σ = 16494.
Its totient is φ = 16492.
The previous prime is 16487. The next prime is 16519. The reversal of 16493 is 39461.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 9604 + 6889 = 98^2 + 83^2
It is an emirp because it is prime and its reverse (39461) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 16493 - 24 = 16477 is a prime.
It is a Sophie Germain prime.
It is a Chen prime.
It is a Curzon number.
It is a plaindrome in base 9.
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 (16433) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8246 + 8247.
It is an arithmetic number, because the mean of its divisors is an integer number (8247).
216493 is an apocalyptic number.
It is an amenable number.
16493 is a deficient number, since it is larger than the sum of its proper divisors (1).
16493 is an equidigital number, since it uses as much as digits as its factorization.
16493 is an evil number, because the sum of its binary digits is even.
The product of its digits is 648, while the sum is 23.
The square root of 16493 is about 128.4250754331.
The cubic root of 16493 is about 25.4546161872.
The spelling of 16493 in words is "sixteen thousand, four hundred ninety-three".