12194909 has 2 divisors, whose sum is σ = 12194910. Its totient is φ = 12194908.

The previous prime is 12194881. The next prime is 12194927. The reversal of 12194909 is 90949121.

12194909 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., 10582009 + 1612900 = 3253^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 12194909 - 2⁸ = 12194653 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12194939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6097454 + 6097455.

It is an arithmetic number, because the mean of its divisors is an integer number (6097455).

Almost surely, 2^12194909 is an apocalyptic number.

It is an amenable number.

12194909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12194909 is an equidigital number, since it uses as much as digits as its factorization.

12194909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 12194909 is about 3492.1209887402. The cubic root of 12194909 is about 230.1757258203.

The spelling of 12194909 in words is "twelve million, one hundred ninety-four thousand, nine hundred nine".