9729171663 has 8 divisors (see below), whose sum is σ = 12974209968. Its totient is φ = 6485123904.

The previous prime is 9729171611. The next prime is 9729171679. The reversal of 9729171663 is 3661719279.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9729171663 - 2¹⁰ = 9729170639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9729171563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224406 + ... + 264227.

It is an arithmetic number, because the mean of its divisors is an integer number (1621776246).

Almost surely, 2^9729171663 is an apocalyptic number.

9729171663 is a deficient number, since it is larger than the sum of its proper divisors (3245038305).

9729171663 is a wasteful number, since it uses less digits than its factorization.

9729171663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495273.

The product of its digits is 857304, while the sum is 51.

The square root of 9729171663 is about 98636.5635198226. The cubic root of 9729171663 is about 2134.8070191412.

The spelling of 9729171663 in words is "nine billion, seven hundred twenty-nine million, one hundred seventy-one thousand, six hundred sixty-three".