9831423521 has 8 divisors (see below), whose sum is σ = 10143722880. Its totient is φ = 9523820592.

The previous prime is 9831423509. The next prime is 9831423557. The reversal of 9831423521 is 1253241389.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9831423521 - 2¹⁴ = 9831407137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9831423571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1169855 + ... + 1178228.

It is an arithmetic number, because the mean of its divisors is an integer number (1267965360).

Almost surely, 2^9831423521 is an apocalyptic number.

It is an amenable number.

9831423521 is a deficient number, since it is larger than the sum of its proper divisors (312299359).

9831423521 is a wasteful number, since it uses less digits than its factorization.

9831423521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348215.

The product of its digits is 51840, while the sum is 38.

The square root of 9831423521 is about 99153.5350907874. The cubic root of 9831423521 is about 2142.2597843281.

The spelling of 9831423521 in words is "nine billion, eight hundred thirty-one million, four hundred twenty-three thousand, five hundred twenty-one".