16684249 has 4 divisors (see below), whose sum is σ = 16846336. Its totient is φ = 16522164.

The previous prime is 16684211. The next prime is 16684267. The reversal of 16684249 is 94248661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94248661 = 13 ⋅7249897.

It is a cyclic number.

It is not a de Polignac number, because 16684249 - 2⁷ = 16684121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16684289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80889 + ... + 81094.

It is an arithmetic number, because the mean of its divisors is an integer number (4211584).

Almost surely, 2^16684249 is an apocalyptic number.

It is an amenable number.

16684249 is a deficient number, since it is larger than the sum of its proper divisors (162087).

16684249 is a wasteful number, since it uses less digits than its factorization.

16684249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162086.

The product of its digits is 82944, while the sum is 40.

The square root of 16684249 is about 4084.6357242721. The cubic root of 16684249 is about 255.5262692828.

The spelling of 16684249 in words is "sixteen million, six hundred eighty-four thousand, two hundred forty-nine".