2193438609 has 10 divisors (see below), whose sum is σ = 3276618290. Its totient is φ = 1462292352.

The previous prime is 2193438601. The next prime is 2193438619. The reversal of 2193438609 is 9068343912.

It is a happy number.

2193438609 is a `hidden beast` number, since 2 + 1 + 9 + 3 + 4 + 38 + 609 = 666.

2193438609 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1713960000 + 479478609 = 41400^2 + 21897^2 .

It is not a de Polignac number, because 2193438609 - 2³ = 2193438601 is a prime.

It is a super-2 number, since 2×2193438609² = 9622345862903709762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2193438601) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13539664 + ... + 13539825.

It is an arithmetic number, because the mean of its divisors is an integer number (327661829).

Almost surely, 2^2193438609 is an apocalyptic number.

It is an amenable number.

2193438609 is a deficient number, since it is larger than the sum of its proper divisors (1083179681).

2193438609 is an equidigital number, since it uses as much as digits as its factorization.

2193438609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27079501 (or 27079492 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 2193438609 is about 46834.1607056217. The cubic root of 2193438609 is about 1299.2971761139.

The spelling of 2193438609 in words is "two billion, one hundred ninety-three million, four hundred thirty-eight thousand, six hundred nine".