2117823794 has 8 divisors (see below), whose sum is σ = 3177074988. Its totient is φ = 1058798800.

The previous prime is 2117823793. The next prime is 2117823811. The reversal of 2117823794 is 4973287112.

It can be written as a sum of positive squares in 2 ways, for example, as 2099014225 + 18809569 = 45815^2 + 4337^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2117823793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30797 + ... + 72000.

Almost surely, 2^2117823794 is an apocalyptic number.

2117823794 is a deficient number, since it is larger than the sum of its proper divisors (1059251194).

2117823794 is a wasteful number, since it uses less digits than its factorization.

2117823794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113100.

The product of its digits is 169344, while the sum is 44.

The square root of 2117823794 is about 46019.8195780905. The cubic root of 2117823794 is about 1284.1919438371.

The spelling of 2117823794 in words is "two billion, one hundred seventeen million, eight hundred twenty-three thousand, seven hundred ninety-four".