12089509 has 2 divisors, whose sum is σ = 12089510. Its totient is φ = 12089508.

The previous prime is 12089507. The next prime is 12089521. The reversal of 12089509 is 90598021.

12089509 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., 8468100 + 3621409 = 2910^2 + 1903^2 .

It is an emirp because it is prime and its reverse (90598021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12089509 - 2¹ = 12089507 is a prime.

It is a super-2 number, since 2×12089509² = 292312455722162, which contains 22 as substring.

Together with 12089507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12089501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6044754 + 6044755.

It is an arithmetic number, because the mean of its divisors is an integer number (6044755).

Almost surely, 2^12089509 is an apocalyptic number.

It is an amenable number.

12089509 is a deficient number, since it is larger than the sum of its proper divisors (1).

12089509 is an equidigital number, since it uses as much as digits as its factorization.

12089509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 12089509 is about 3476.9971239562. The cubic root of 12089509 is about 229.5106736191.

The spelling of 12089509 in words is "twelve million, eighty-nine thousand, five hundred nine".