16684039 has 4 divisors (see below), whose sum is σ = 17409456. Its totient is φ = 15958624.

The previous prime is 16684009. The next prime is 16684061. The reversal of 16684039 is 93048661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93048661 = 181 ⋅514081.

It is a cyclic number.

It is not a de Polignac number, because 16684039 - 2¹¹ = 16681991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16683989 and 16684007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16684009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362674 + ... + 362719.

It is an arithmetic number, because the mean of its divisors is an integer number (4352364).

Almost surely, 2^16684039 is an apocalyptic number.

16684039 is a deficient number, since it is larger than the sum of its proper divisors (725417).

16684039 is an equidigital number, since it uses as much as digits as its factorization.

16684039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725416.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 16684039 is about 4084.6100181045. The cubic root of 16684039 is about 255.5251971989.

The spelling of 16684039 in words is "sixteen million, six hundred eighty-four thousand, thirty-nine".