2193839194 has 4 divisors (see below), whose sum is σ = 3290758794. Its totient is φ = 1096919596.

The previous prime is 2193839191. The next prime is 2193839209. The reversal of 2193839194 is 4919383912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2133978025 + 59861169 = 46195^2 + 7737^2 .

It is not an unprimeable number, because it can be changed into a prime (2193839191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 548459797 + ... + 548459800.

Almost surely, 2^2193839194 is an apocalyptic number.

2193839194 is a deficient number, since it is larger than the sum of its proper divisors (1096919600).

2193839194 is a wasteful number, since it uses less digits than its factorization.

2193839194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096919599.

The product of its digits is 419904, while the sum is 49.

The square root of 2193839194 is about 46838.4371430132. The cubic root of 2193839194 is about 1299.3762676487.

The spelling of 2193839194 in words is "two billion, one hundred ninety-three million, eight hundred thirty-nine thousand, one hundred ninety-four".