9801843871 has 4 divisors (see below), whose sum is σ = 9879023872. Its totient is φ = 9724663872.

The previous prime is 9801843847. The next prime is 9801843907. The reversal of 9801843871 is 1783481089.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9801843871 - 2²⁵ = 9768289439 is a prime.

It is a super-2 number, since 2×9801843871² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9801843071) 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, 38589810 + ... + 38590063.

It is an arithmetic number, because the mean of its divisors is an integer number (2469755968).

Almost surely, 2^9801843871 is an apocalyptic number.

9801843871 is a deficient number, since it is larger than the sum of its proper divisors (77180001).

9801843871 is a wasteful number, since it uses less digits than its factorization.

9801843871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77180000.

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 9801843871 is about 99004.2618830119. The cubic root of 9801843871 is about 2140.1091648828.

The spelling of 9801843871 in words is "nine billion, eight hundred one million, eight hundred forty-three thousand, eight hundred seventy-one".