16684091 has 2 divisors, whose sum is σ = 16684092. Its totient is φ = 16684090.

The previous prime is 16684081. The next prime is 16684093. The reversal of 16684091 is 19048661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16684091 is a prime.

Together with 16684093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16684093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342045 + 8342046.

It is an arithmetic number, because the mean of its divisors is an integer number (8342046).

Almost surely, 2^16684091 is an apocalyptic number.

16684091 is a deficient number, since it is larger than the sum of its proper divisors (1).

16684091 is an equidigital number, since it uses as much as digits as its factorization.

16684091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 16684091 is about 4084.6163834563. The cubic root of 16684091 is about 255.5254626681.

The spelling of 16684091 in words is "sixteen million, six hundred eighty-four thousand, ninety-one".