12030209 has 2 divisors, whose sum is σ = 12030210. Its totient is φ = 12030208.

The previous prime is 12030197. The next prime is 12030223. The reversal of 12030209 is 90203021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7840000 + 4190209 = 2800^2 + 2047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12030209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12030229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015104 + 6015105.

It is an arithmetic number, because the mean of its divisors is an integer number (6015105).

Almost surely, 2^12030209 is an apocalyptic number.

It is an amenable number.

12030209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12030209 is an equidigital number, since it uses as much as digits as its factorization.

12030209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 12030209 is about 3468.4591679880. The cubic root of 12030209 is about 229.1348023722.

The spelling of 12030209 in words is "twelve million, thirty thousand, two hundred nine".