9819391804 has 12 divisors (see below), whose sum is σ = 17199607824. Its totient is φ = 4905218144.

The previous prime is 9819391789. The next prime is 9819391831. The reversal of 9819391804 is 4081939189.

It is a super-3 number, since 3×9819391804³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1114504 + ... + 1123279.

It is an arithmetic number, because the mean of its divisors is an integer number (1433300652).

Almost surely, 2^9819391804 is an apocalyptic number.

It is an amenable number.

9819391804 is a deficient number, since it is larger than the sum of its proper divisors (7380216020).

9819391804 is a wasteful number, since it uses less digits than its factorization.

9819391804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2238884 (or 2238882 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The square root of 9819391804 is about 99092.8443632536. The cubic root of 9819391804 is about 2141.3855268993.

The spelling of 9819391804 in words is "nine billion, eight hundred nineteen million, three hundred ninety-one thousand, eight hundred four".