2193979738 has 8 divisors (see below), whose sum is σ = 3291353460. Its totient is φ = 1096861920.

The previous prime is 2193979721. The next prime is 2193979751. The reversal of 2193979738 is 8379793912.

It can be written as a sum of positive squares in 2 ways, for example, as 2115356049 + 78623689 = 45993^2 + 8867^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40873 + ... + 77836.

Almost surely, 2^2193979738 is an apocalyptic number.

2193979738 is a deficient number, since it is larger than the sum of its proper divisors (1097373722).

2193979738 is a wasteful number, since it uses less digits than its factorization.

2193979738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127952.

The product of its digits is 5143824, while the sum is 58.

The square root of 2193979738 is about 46839.9374252357. The cubic root of 2193979738 is about 1299.4040143858.

The spelling of 2193979738 in words is "two billion, one hundred ninety-three million, nine hundred seventy-nine thousand, seven hundred thirty-eight".