16684789 has 16 divisors (see below), whose sum is σ = 18998784. Its totient is φ = 14515200.

The previous prime is 16684777. The next prime is 16684841. The reversal of 16684789 is 98748661.

It is a cyclic number.

It is not a de Polignac number, because 16684789 - 2⁹ = 16684277 is a prime.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38317 + ... + 38749.

It is an arithmetic number, because the mean of its divisors is an integer number (1187424).

Almost surely, 2^16684789 is an apocalyptic number.

It is an amenable number.

16684789 is a deficient number, since it is larger than the sum of its proper divisors (2313995).

16684789 is a wasteful number, since it uses less digits than its factorization.

16684789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588.

The product of its digits is 580608, while the sum is 49.

The square root of 16684789 is about 4084.7018251030. The cubic root of 16684789 is about 255.5290260285.

The spelling of 16684789 in words is "sixteen million, six hundred eighty-four thousand, seven hundred eighty-nine".