16989547 has 2 divisors, whose sum is σ = 16989548. Its totient is φ = 16989546.

The previous prime is 16989529. The next prime is 16989569. The reversal of 16989547 is 74598961.

It is a weak prime.

It is an emirp because it is prime and its reverse (74598961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16989547 - 2¹¹ = 16987499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16989547.

It is not a weakly prime, because it can be changed into another prime (16989527) 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, 8494773 + 8494774.

It is an arithmetic number, because the mean of its divisors is an integer number (8494774).

Almost surely, 2^16989547 is an apocalyptic number.

16989547 is a deficient number, since it is larger than the sum of its proper divisors (1).

16989547 is an equidigital number, since it uses as much as digits as its factorization.

16989547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 49.

The square root of 16989547 is about 4121.8378182553. The cubic root of 16989547 is about 257.0754470713.

It can be divided in two parts, 1698954 and 7, that added together give a palindrome (1698961).

The spelling of 16989547 in words is "sixteen million, nine hundred eighty-nine thousand, five hundred forty-seven".