7113209 has 2 divisors, whose sum is σ = 7113210. Its totient is φ = 7113208.

The previous prime is 7113203. The next prime is 7113221. The reversal of 7113209 is 9023117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6786025 + 327184 = 2605^2 + 572^2 .

It is an emirp because it is prime and its reverse (9023117) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7113209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7113203) 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, 3556604 + 3556605.

It is an arithmetic number, because the mean of its divisors is an integer number (3556605).

Almost surely, 2^7113209 is an apocalyptic number.

It is an amenable number.

7113209 is a deficient number, since it is larger than the sum of its proper divisors (1).

7113209 is an equidigital number, since it uses as much as digits as its factorization.

7113209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 7113209 is about 2667.0599918262. The cubic root of 7113209 is about 192.3188513443.

The spelling of 7113209 in words is "seven million, one hundred thirteen thousand, two hundred nine".