9834921853 has 4 divisors (see below), whose sum is σ = 9877869340. Its totient is φ = 9791974368.

The previous prime is 9834921851. The next prime is 9834921871. The reversal of 9834921853 is 3581294389.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3581294389 = 409 ⋅8756221.

It can be written as a sum of positive squares in 2 ways, for example, as 3869213209 + 5965708644 = 62203^2 + 77238^2 .

It is a cyclic number.

It is not a de Polignac number, because 9834921853 - 2¹ = 9834921851 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9834921853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9834921851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21473400 + ... + 21473857.

It is an arithmetic number, because the mean of its divisors is an integer number (2469467335).

Almost surely, 2^9834921853 is an apocalyptic number.

It is an amenable number.

9834921853 is a deficient number, since it is larger than the sum of its proper divisors (42947487).

9834921853 is a wasteful number, since it uses less digits than its factorization.

9834921853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42947486.

The product of its digits is 1866240, while the sum is 52.

The square root of 9834921853 is about 99171.1745065067. The cubic root of 9834921853 is about 2142.5138488321.

The spelling of 9834921853 in words is "nine billion, eight hundred thirty-four million, nine hundred twenty-one thousand, eight hundred fifty-three".