9009509 has 2 divisors, whose sum is σ = 9009510. Its totient is φ = 9009508.

The previous prime is 9009487. The next prime is 9009521. The reversal of 9009509 is 9059009.

9009509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7409284 + 1600225 = 2722^2 + 1265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9009509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9009409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4504754 + 4504755.

It is an arithmetic number, because the mean of its divisors is an integer number (4504755).

Almost surely, 2^9009509 is an apocalyptic number.

It is an amenable number.

9009509 is a deficient number, since it is larger than the sum of its proper divisors (1).

9009509 is an equidigital number, since it uses as much as digits as its factorization.

9009509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 32.

The square root of 9009509 is about 3001.5844149382. The cubic root of 9009509 is about 208.0816139908.

The spelling of 9009509 in words is "nine million, nine thousand, five hundred nine".