12190209 has 4 divisors (see below), whose sum is σ = 16253616. Its totient is φ = 8126804.

The previous prime is 12190187. The next prime is 12190219. The reversal of 12190209 is 90209121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12190209 - 2⁷ = 12190081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12190219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031699 + ... + 2031704.

It is an arithmetic number, because the mean of its divisors is an integer number (4063404).

Almost surely, 2^12190209 is an apocalyptic number.

It is an amenable number.

12190209 is a deficient number, since it is larger than the sum of its proper divisors (4063407).

12190209 is an equidigital number, since it uses as much as digits as its factorization.

12190209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063406.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 12190209 is about 3491.4479804230. The cubic root of 12190209 is about 230.1461515960.

The spelling of 12190209 in words is "twelve million, one hundred ninety thousand, two hundred nine".