9697724689689 has 15 divisors (see below), whose sum is σ = 14486766404143. Its totient is φ = 6465131108424.

The previous prime is 9697724689643. The next prime is 9697724689733. The reversal of 9697724689689 is 9869864277969.

The square root of 9697724689689 is 3114117.

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

9697724689689 is a `hidden beast` number, since 9 + 69 + 7 + 7 + 2 + 468 + 9 + 6 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9536516015625 + 161208674064 = 3088125^2 + 401508^2 .

It is not a de Polignac number, because 9697724689689 - 2¹⁹ = 9697724165401 is a prime.

It is a super-2 number, since 2×9697724689689² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9697724689599 and 9697724689608.

It is not an unprimeable number, because it can be changed into a prime (9697724688689) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 27854047 + ... + 28200059.

Almost surely, 2^{9697724689689} is an apocalyptic number.

9697724689689 is the 3114117-th square number.

9697724689689 is the 1557059-th centered octagonal number.

It is an amenable number.

9697724689689 is a deficient number, since it is larger than the sum of its proper divisors (4789041714454).

9697724689689 is an frugal number, since it uses more digits than its factorization.

9697724689689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692038 (or 346016 counting only the distinct ones).

The product of its digits is 35554111488, while the sum is 90.

The spelling of 9697724689689 in words is "nine trillion, six hundred ninety-seven billion, seven hundred twenty-four million, six hundred eighty-nine thousand, six hundred eighty-nine".