8160209 has 2 divisors, whose sum is σ = 8160210. Its totient is φ = 8160208.

The previous prime is 8160199. The next prime is 8160211. The reversal of 8160209 is 9020618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5895184 + 2265025 = 2428^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 8160209 - 2⁸ = 8159953 is a prime.

Together with 8160211, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8160259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4080104 + 4080105.

It is an arithmetic number, because the mean of its divisors is an integer number (4080105).

Almost surely, 2^8160209 is an apocalyptic number.

It is an amenable number.

8160209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8160209 is an equidigital number, since it uses as much as digits as its factorization.

8160209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 8160209 is about 2856.6079535001. The cubic root of 8160209 is about 201.3262607221.

The spelling of 8160209 in words is "eight million, one hundred sixty thousand, two hundred nine".