12190009 has 4 divisors (see below), whose sum is σ = 13127716. Its totient is φ = 11252304.

The previous prime is 12190007. The next prime is 12190019. The reversal of 12190009 is 90009121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90009121 = 499 ⋅180379.

It can be written as a sum of positive squares in 2 ways, for example, as 595984 + 11594025 = 772^2 + 3405^2 .

It is a cyclic number.

It is not a de Polignac number, because 12190009 - 2¹ = 12190007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12190007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468834 + ... + 468859.

It is an arithmetic number, because the mean of its divisors is an integer number (3281929).

Almost surely, 2^12190009 is an apocalyptic number.

It is an amenable number.

12190009 is a deficient number, since it is larger than the sum of its proper divisors (937707).

12190009 is an equidigital number, since it uses as much as digits as its factorization.

12190009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937706.

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

The square root of 12190009 is about 3491.4193388936. The cubic root of 12190009 is about 230.1448929497.

The spelling of 12190009 in words is "twelve million, one hundred ninety thousand, nine".