9702396427689 has 81 divisors (see below), whose sum is σ = 17044938606423. Its totient is φ = 5302350877824.

The previous prime is 9702396427687. The next prime is 9702396427739. The reversal of 9702396427689 is 9867246932079.

The square root of 9702396427689 is 3114867.

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

9702396427689 is a `hidden beast` number, since 97 + 0 + 2 + 39 + 6 + 427 + 6 + 89 = 666.

9702396427689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9409758706089 + 292637721600 = 3067533^2 + 540960^2 .

It is not a de Polignac number, because 9702396427689 - 2¹ = 9702396427687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9702396427681) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1504477537 + ... + 1504483985.

Almost surely, 2^{9702396427689} is an apocalyptic number.

9702396427689 is the 3114867-th square number.

9702396427689 is the 1557434-th centered octagonal number.

It is an amenable number.

9702396427689 is a deficient number, since it is larger than the sum of its proper divisors (7342542178734).

9702396427689 is an frugal number, since it uses more digits than its factorization.

9702396427689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964 (or 6482 counting only the distinct ones).

The product of its (nonzero) digits is 493807104, while the sum is 72.

The spelling of 9702396427689 in words is "nine trillion, seven hundred two billion, three hundred ninety-six million, four hundred twenty-seven thousand, six hundred eighty-nine".