16449 has 4 divisors (see below), whose sum is σ = 21936. Its totient is φ = 10964.

The previous prime is 16447. The next prime is 16451. The reversal of 16449 is 94461.

16449 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (16447) and next prime (16451).

It is a cyclic number.

It is not a de Polignac number, because 16449 - 2¹ = 16447 is a prime.

It is a D-number.

16449 is a lucky number.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 16449.

It is not an unprimeable number, because it can be changed into a prime (16447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2739 + ... + 2744.

It is an arithmetic number, because the mean of its divisors is an integer number (5484).

2¹⁶⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

16449 is a deficient number, since it is larger than the sum of its proper divisors (5487).

16449 is an equidigital number, since it uses as much as digits as its factorization.

16449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486.

The product of its digits is 864, while the sum is 24.

The square root of 16449 is about 128.2536549187. The cubic root of 16449 is about 25.4319600993.

It can be divided in two parts, 1644 and 9, that added together give a triangular number (1653 = T₅₇).

The spelling of 16449 in words is "sixteen thousand, four hundred forty-nine".