12019009 has 2 divisors, whose sum is σ = 12019010. Its totient is φ = 12019008.

The previous prime is 12018997. The next prime is 12019069. The reversal of 12019009 is 90091021.

12019009 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., 8832784 + 3186225 = 2972^2 + 1785^2 .

It is an emirp because it is prime and its reverse (90091021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12019009 - 2⁵ = 12018977 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (12019069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6009504 + 6009505.

It is an arithmetic number, because the mean of its divisors is an integer number (6009505).

Almost surely, 2^12019009 is an apocalyptic number.

It is an amenable number.

12019009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12019009 is an equidigital number, since it uses as much as digits as its factorization.

12019009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 12019009 is about 3466.8442422468. The cubic root of 12019009 is about 229.0636729180.

The spelling of 12019009 in words is "twelve million, nineteen thousand, nine".