16461689 has 2 divisors, whose sum is σ = 16461690. Its totient is φ = 16461688.

The previous prime is 16461677. The next prime is 16461737. The reversal of 16461689 is 98616461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15936064 + 525625 = 3992^2 + 725^2 .

It is an emirp because it is prime and its reverse (98616461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16461689 - 2¹² = 16457593 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16461659) 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, 8230844 + 8230845.

It is an arithmetic number, because the mean of its divisors is an integer number (8230845).

Almost surely, 2^16461689 is an apocalyptic number.

It is an amenable number.

16461689 is a deficient number, since it is larger than the sum of its proper divisors (1).

16461689 is an equidigital number, since it uses as much as digits as its factorization.

16461689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 16461689 is about 4057.3007036699. The cubic root of 16461689 is about 254.3849794756.

The spelling of 16461689 in words is "sixteen million, four hundred sixty-one thousand, six hundred eighty-nine".