99235925128729 has 3 divisors (see below), whose sum is σ = 99235935090453. Its totient is φ = 99235915167006.

The previous prime is 99235925128667. The next prime is 99235925128817. The reversal of 99235925128729 is 92782152953299.

The square root of 99235925128729 is 9961723.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-99235925128729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99235925128829) 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 2 ways as a sum of consecutive naturals, for example, 4980862 + ... + 14942584.

It is an arithmetic number, because the mean of its divisors is an integer number (33078645030151).

Almost surely, 2^{99235925128729} is an apocalyptic number.

99235925128729 is the 9961723-rd square number.

99235925128729 is the 4980862-nd centered octagonal number.

It is an amenable number.

99235925128729 is a deficient number, since it is larger than the sum of its proper divisors (9961724).

99235925128729 is an frugal number, since it uses more digits than its factorization.

99235925128729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19923446 (or 9961723 counting only the distinct ones).

The product of its digits is 440899200, while the sum is 73.

The spelling of 99235925128729 in words is "ninety-nine trillion, two hundred thirty-five billion, nine hundred twenty-five million, one hundred twenty-eight thousand, seven hundred twenty-nine".