2194609 has 4 divisors (see below), whose sum is σ = 2198016. Its totient is φ = 2191204.

The previous prime is 2194579. The next prime is 2194613. The reversal of 2194609 is 9064912.

It is a happy number.

2194609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-2194609 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2194639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409 + ... + 2134.

It is an arithmetic number, because the mean of its divisors is an integer number (549504).

2^2194609 is an apocalyptic number.

It is an amenable number.

2194609 is a deficient number, since it is larger than the sum of its proper divisors (3407).

2194609 is an equidigital number, since it uses as much as digits as its factorization.

2194609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2194609 is about 1481.4212770174. The cubic root of 2194609 is about 129.9528231183.

The spelling of 2194609 in words is "two million, one hundred ninety-four thousand, six hundred nine".