8673209 has 2 divisors, whose sum is σ = 8673210. Its totient is φ = 8673208.

The previous prime is 8673199. The next prime is 8673221. The reversal of 8673209 is 9023768.

8673209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7812025 + 861184 = 2795^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 8673209 - 2⁸ = 8672953 is a prime.

It is not a weakly prime, because it can be changed into another prime (8673109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4336604 + 4336605.

It is an arithmetic number, because the mean of its divisors is an integer number (4336605).

Almost surely, 2^8673209 is an apocalyptic number.

It is an amenable number.

8673209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8673209 is an equidigital number, since it uses as much as digits as its factorization.

8673209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 8673209 is about 2945.0312392231. The cubic root of 8673209 is about 205.4596783722.

The spelling of 8673209 in words is "eight million, six hundred seventy-three thousand, two hundred nine".