9789819494 has 24 divisors (see below), whose sum is σ = 18172822320. Its totient is φ = 3872894688.

The previous prime is 9789819493. The next prime is 9789819509. The reversal of 9789819494 is 4949189879.

9789819494 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9789819493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2066489 + ... + 2071220.

It is an arithmetic number, because the mean of its divisors is an integer number (757200930).

Almost surely, 2^9789819494 is an apocalyptic number.

9789819494 is a deficient number, since it is larger than the sum of its proper divisors (8383002826).

9789819494 is a wasteful number, since it uses less digits than its factorization.

9789819494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4137744 (or 4137731 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 68.

The square root of 9789819494 is about 98943.5166850259. The cubic root of 9789819494 is about 2139.2336830260.

The spelling of 9789819494 in words is "nine billion, seven hundred eighty-nine million, eight hundred nineteen thousand, four hundred ninety-four".