16695589 has 2 divisors, whose sum is σ = 16695590. Its totient is φ = 16695588.

The previous prime is 16695587. The next prime is 16695593. The reversal of 16695589 is 98559661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13198689 + 3496900 = 3633^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 16695589 - 2¹ = 16695587 is a prime.

Together with 16695587, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16695587) 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, 8347794 + 8347795.

It is an arithmetic number, because the mean of its divisors is an integer number (8347795).

Almost surely, 2^16695589 is an apocalyptic number.

It is an amenable number.

16695589 is a deficient number, since it is larger than the sum of its proper divisors (1).

16695589 is an equidigital number, since it uses as much as digits as its factorization.

16695589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 49.

The square root of 16695589 is about 4086.0236171613. The cubic root of 16695589 is about 255.5841484566.

The spelling of 16695589 in words is "sixteen million, six hundred ninety-five thousand, five hundred eighty-nine".