16684841 has 2 divisors, whose sum is σ = 16684842. Its totient is φ = 16684840.

The previous prime is 16684777. The next prime is 16684847. The reversal of 16684841 is 14848661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 4713241 = 3460^2 + 2171^2 .

It is an emirp because it is prime and its reverse (14848661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16684841 - 2⁶ = 16684777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16684795 and 16684804.

It is not a weakly prime, because it can be changed into another prime (16684847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342420 + 8342421.

It is an arithmetic number, because the mean of its divisors is an integer number (8342421).

Almost surely, 2^16684841 is an apocalyptic number.

It is an amenable number.

16684841 is a deficient number, since it is larger than the sum of its proper divisors (1).

16684841 is an equidigital number, since it uses as much as digits as its factorization.

16684841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 38.

The square root of 16684841 is about 4084.7081903118. The cubic root of 16684841 is about 255.5292914898.

The spelling of 16684841 in words is "sixteen million, six hundred eighty-four thousand, eight hundred forty-one".