12199609 has 2 divisors, whose sum is σ = 12199610. Its totient is φ = 12199608.

The previous prime is 12199571. The next prime is 12199643. The reversal of 12199609 is 90699121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7683984 + 4515625 = 2772^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 12199609 - 2⁹ = 12199097 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12199669) 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, 6099804 + 6099805.

It is an arithmetic number, because the mean of its divisors is an integer number (6099805).

Almost surely, 2^12199609 is an apocalyptic number.

It is an amenable number.

12199609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12199609 is an equidigital number, since it uses as much as digits as its factorization.

12199609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 12199609 is about 3492.7938673789. The cubic root of 12199609 is about 230.2052924468.

The spelling of 12199609 in words is "twelve million, one hundred ninety-nine thousand, six hundred nine".