9829173121 has 4 divisors (see below), whose sum is σ = 10038304512. Its totient is φ = 9620041732.

The previous prime is 9829173091. The next prime is 9829173139. The reversal of 9829173121 is 1213719289.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9829173121 - 2⁹ = 9829172609 is a prime.

It is a super-2 number, since 2×9829173121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9829173161) 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, 104565625 + ... + 104565718.

It is an arithmetic number, because the mean of its divisors is an integer number (2509576128).

Almost surely, 2^9829173121 is an apocalyptic number.

It is an amenable number.

9829173121 is a deficient number, since it is larger than the sum of its proper divisors (209131391).

9829173121 is a wasteful number, since it uses less digits than its factorization.

9829173121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209131390.

The product of its digits is 54432, while the sum is 43.

The square root of 9829173121 is about 99142.1863840010. The cubic root of 9829173121 is about 2142.0963183664.

The spelling of 9829173121 in words is "nine billion, eight hundred twenty-nine million, one hundred seventy-three thousand, one hundred twenty-one".