16673309 has 2 divisors, whose sum is σ = 16673310. Its totient is φ = 16673308.

The previous prime is 16673281. The next prime is 16673329. The reversal of 16673309 is 90337661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 4318084 = 3515^2 + 2078^2 .

It is a cyclic number.

It is not a de Polignac number, because 16673309 - 2⁸ = 16673053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16673329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8336654 + 8336655.

It is an arithmetic number, because the mean of its divisors is an integer number (8336655).

Almost surely, 2^16673309 is an apocalyptic number.

It is an amenable number.

16673309 is a deficient number, since it is larger than the sum of its proper divisors (1).

16673309 is an equidigital number, since it uses as much as digits as its factorization.

16673309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 16673309 is about 4083.2963399685. The cubic root of 16673309 is about 255.4704068421.

The spelling of 16673309 in words is "sixteen million, six hundred seventy-three thousand, three hundred nine".