9856121284 has 9 divisors (see below), whose sum is σ = 17248559727. Its totient is φ = 4927961364.

The previous prime is 9856121273. The next prime is 9856121287. The reversal of 9856121284 is 4821216589.

The square root of 9856121284 is 99278.

It is a perfect power (a square), and thus also a powerful number.

9856121284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9856121287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 173737 + ... + 223375.

Almost surely, 2^9856121284 is an apocalyptic number.

9856121284 is the 99278-th square number.

It is an amenable number.

9856121284 is a deficient number, since it is larger than the sum of its proper divisors (7392438443).

9856121284 is an frugal number, since it uses more digits than its factorization.

9856121284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99282 (or 49641 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The cubic root of 9856121284 is about 2144.0521589305.

The spelling of 9856121284 in words is "nine billion, eight hundred fifty-six million, one hundred twenty-one thousand, two hundred eighty-four".