9708128523 has 6 divisors (see below), whose sum is σ = 14022852324. Its totient is φ = 6472085676.

The previous prime is 9708128519. The next prime is 9708128567. The reversal of 9708128523 is 3258218079.

It is a happy number.

It is not a de Polignac number, because 9708128523 - 2² = 9708128519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9708128513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 539340465 + ... + 539340482.

It is an arithmetic number, because the mean of its divisors is an integer number (2337142054).

Almost surely, 2^9708128523 is an apocalyptic number.

9708128523 is a deficient number, since it is larger than the sum of its proper divisors (4314723801).

9708128523 is a wasteful number, since it uses less digits than its factorization.

9708128523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078680953 (or 1078680950 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 9708128523 is about 98529.8356996499. The cubic root of 9708128523 is about 2133.2667897023.

The spelling of 9708128523 in words is "nine billion, seven hundred eight million, one hundred twenty-eight thousand, five hundred twenty-three".