9909431325 has 192 divisors, whose sum is σ = 20184422400. Its totient is φ = 4744396800.

The previous prime is 9909431321. The next prime is 9909431339. The reversal of 9909431325 is 5231349099.

It is not a de Polignac number, because 9909431325 - 2² = 9909431321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9909431321) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 31659369 + ... + 31659681.

It is an arithmetic number, because the mean of its divisors is an integer number (105127200).

Almost surely, 2^9909431325 is an apocalyptic number.

9909431325 is the 53210-th nonagonal number.

It is an amenable number.

9909431325 is an abundant number, since it is smaller than the sum of its proper divisors (10274991075).

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

9909431325 is a wasteful number, since it uses less digits than its factorization.

9909431325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 458 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 9909431325 is about 99546.1266197736. The cubic root of 9909431325 is about 2147.9108117364.

The spelling of 9909431325 in words is "nine billion, nine hundred nine million, four hundred thirty-one thousand, three hundred twenty-five".