9720171489 has 32 divisors (see below), whose sum is σ = 15325241344. Its totient is φ = 5362640640.

The previous prime is 9720171467. The next prime is 9720171497. The reversal of 9720171489 is 9841710279.

It is not a de Polignac number, because 9720171489 - 2¹⁶ = 9720105953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9720171089) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 264642 + ... + 299124.

It is an arithmetic number, because the mean of its divisors is an integer number (478913792).

Almost surely, 2^9720171489 is an apocalyptic number.

It is an amenable number.

9720171489 is a deficient number, since it is larger than the sum of its proper divisors (5605069855).

9720171489 is a wasteful number, since it uses less digits than its factorization.

9720171489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34957.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 9720171489 is about 98590.9300544426. The cubic root of 9720171489 is about 2134.1485334037.

The spelling of 9720171489 in words is "nine billion, seven hundred twenty million, one hundred seventy-one thousand, four hundred eighty-nine".