9853921000 has 128 divisors (see below), whose sum is σ = 28748079360. Its totient is φ = 3071328000.

The previous prime is 9853920997. The next prime is 9853921003. The reversal of 9853921000 is 1293589.

It is an interprime number because it is at equal distance from previous prime (9853920997) and next prime (9853921003).

It is not an unprimeable number, because it can be changed into a prime (9853921003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13014 + ... + 140986.

It is an arithmetic number, because the mean of its divisors is an integer number (224594370).

Almost surely, 2^9853921000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9853921000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14374039680).

9853921000 is an abundant number, since it is smaller than the sum of its proper divisors (18894158360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9853921000 is a wasteful number, since it uses less digits than its factorization.

9853921000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128012 (or 127998 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 9853921000 is about 99266.9179535660. The cubic root of 9853921000 is about 2143.8926007360.

The spelling of 9853921000 in words is "nine billion, eight hundred fifty-three million, nine hundred twenty-one thousand".