9785129923 has 8 divisors (see below), whose sum is σ = 10034152128. Its totient is φ = 9537083304.

The previous prime is 9785129911. The next prime is 9785129947. The reversal of 9785129923 is 3299215879.

9785129923 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 9785129923 - 2⁹ = 9785129411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9785129993) 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, 223561 + ... + 263722.

It is an arithmetic number, because the mean of its divisors is an integer number (1254269016).

Almost surely, 2^9785129923 is an apocalyptic number.

9785129923 is a deficient number, since it is larger than the sum of its proper divisors (249022205).

9785129923 is a wasteful number, since it uses less digits than its factorization.

9785129923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487793.

The product of its digits is 2449440, while the sum is 55.

The square root of 9785129923 is about 98919.8156235645. The cubic root of 9785129923 is about 2138.8920461331.

The spelling of 9785129923 in words is "nine billion, seven hundred eighty-five million, one hundred twenty-nine thousand, nine hundred twenty-three".