16541089 has 2 divisors, whose sum is σ = 16541090. Its totient is φ = 16541088.

The previous prime is 16541087. The next prime is 16541093. The reversal of 16541089 is 98014561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16160400 + 380689 = 4020^2 + 617^2 .

It is a cyclic number.

It is not a de Polignac number, because 16541089 - 2¹ = 16541087 is a prime.

Together with 16541087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16541087) 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, 8270544 + 8270545.

It is an arithmetic number, because the mean of its divisors is an integer number (8270545).

Almost surely, 2^16541089 is an apocalyptic number.

It is an amenable number.

16541089 is a deficient number, since it is larger than the sum of its proper divisors (1).

16541089 is an equidigital number, since it uses as much as digits as its factorization.

16541089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 16541089 is about 4067.0737637766. The cubic root of 16541089 is about 254.7933170816.

The spelling of 16541089 in words is "sixteen million, five hundred forty-one thousand, eighty-nine".