16689073 has 2 divisors, whose sum is σ = 16689074. Its totient is φ = 16689072.

The previous prime is 16689061. The next prime is 16689077. The reversal of 16689073 is 37098661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15303744 + 1385329 = 3912^2 + 1177^2 .

It is a cyclic number.

It is not a de Polignac number, because 16689073 - 2¹⁷ = 16558001 is a prime.

It is not a weakly prime, because it can be changed into another prime (16689077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344536 + 8344537.

It is an arithmetic number, because the mean of its divisors is an integer number (8344537).

Almost surely, 2^16689073 is an apocalyptic number.

It is an amenable number.

16689073 is a deficient number, since it is larger than the sum of its proper divisors (1).

16689073 is an equidigital number, since it uses as much as digits as its factorization.

16689073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 16689073 is about 4085.2261871284. The cubic root of 16689073 is about 255.5508941039.

The spelling of 16689073 in words is "sixteen million, six hundred eighty-nine thousand, seventy-three".