3109219609 has 4 divisors (see below), whose sum is σ = 3113462116. Its totient is φ = 3104977104.

The previous prime is 3109219559. The next prime is 3109219637. The reversal of 3109219609 is 9069129013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9069129013 = 7 ⋅1295589859.

It can be written as a sum of positive squares in 2 ways, for example, as 1550154384 + 1559065225 = 39372^2 + 39485^2 .

It is a cyclic number.

It is not a de Polignac number, because 3109219609 - 2⁷ = 3109219481 is a prime.

It is a super-2 number, since 2×3109219609² = 19334493153980225762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3109219699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2120154 + ... + 2121619.

It is an arithmetic number, because the mean of its divisors is an integer number (778365529).

Almost surely, 2^3109219609 is an apocalyptic number.

It is an amenable number.

3109219609 is a deficient number, since it is larger than the sum of its proper divisors (4242507).

3109219609 is an equidigital number, since it uses as much as digits as its factorization.

3109219609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242506.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 3109219609 is about 55760.3766934909. The cubic root of 3109219609 is about 1459.5438008287.

The spelling of 3109219609 in words is "three billion, one hundred nine million, two hundred nineteen thousand, six hundred nine".