16316689 has 2 divisors, whose sum is σ = 16316690. Its totient is φ = 16316688.

The previous prime is 16316681. The next prime is 16316731. The reversal of 16316689 is 98661361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 5721664 = 3255^2 + 2392^2 .

It is an emirp because it is prime and its reverse (98661361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16316689 - 2³ = 16316681 is a prime.

It is not a weakly prime, because it can be changed into another prime (16316681) 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 as a sum of consecutive naturals, namely, 8158344 + 8158345.

It is an arithmetic number, because the mean of its divisors is an integer number (8158345).

Almost surely, 2^16316689 is an apocalyptic number.

It is an amenable number.

16316689 is a deficient number, since it is larger than the sum of its proper divisors (1).

16316689 is an equidigital number, since it uses as much as digits as its factorization.

16316689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 16316689 is about 4039.3921572435. The cubic root of 16316689 is about 253.6358733547.

The spelling of 16316689 in words is "sixteen million, three hundred sixteen thousand, six hundred eighty-nine".