16682993 has 2 divisors, whose sum is σ = 16682994. Its totient is φ = 16682992.

The previous prime is 16682971. The next prime is 16682999. The reversal of 16682993 is 39928661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15626209 + 1056784 = 3953^2 + 1028^2 .

It is a cyclic number.

It is not a de Polignac number, because 16682993 - 2⁸ = 16682737 is a prime.

It is not a weakly prime, because it can be changed into another prime (16682999) 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 as a sum of consecutive naturals, namely, 8341496 + 8341497.

It is an arithmetic number, because the mean of its divisors is an integer number (8341497).

Almost surely, 2^16682993 is an apocalyptic number.

It is an amenable number.

16682993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16682993 is an equidigital number, since it uses as much as digits as its factorization.

16682993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 16682993 is about 4084.4819744981. The cubic root of 16682993 is about 255.5198570663.

The spelling of 16682993 in words is "sixteen million, six hundred eighty-two thousand, nine hundred ninety-three".