9821131304 has 8 divisors (see below), whose sum is σ = 18414621210. Its totient is φ = 4910565648.

The previous prime is 9821131301. The next prime is 9821131337. The reversal of 9821131304 is 4031311289.

It can be written as a sum of positive squares in only one way, i.e., 5964472900 + 3856658404 = 77230^2 + 62102^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (9821131301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613820699 + ... + 613820714.

Almost surely, 2^9821131304 is an apocalyptic number.

It is an amenable number.

9821131304 is a deficient number, since it is larger than the sum of its proper divisors (8593489906).

9821131304 is a wasteful number, since it uses less digits than its factorization.

9821131304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227641419 (or 1227641415 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 9821131304 is about 99101.6210967308. The cubic root of 9821131304 is about 2141.5119678664.

The spelling of 9821131304 in words is "nine billion, eight hundred twenty-one million, one hundred thirty-one thousand, three hundred four".