9720609 has 8 divisors (see below), whose sum is σ = 13643040. Its totient is φ = 6139296.

The previous prime is 9720589. The next prime is 9720619. The reversal of 9720609 is 9060279.

9720609 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 9720609 - 2⁸ = 9720353 is a prime.

9720609 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9720609.

It is not an unprimeable number, because it can be changed into a prime (9720619) 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, 85212 + ... + 85325.

It is an arithmetic number, because the mean of its divisors is an integer number (1705380).

Almost surely, 2^9720609 is an apocalyptic number.

It is an amenable number.

9720609 is a deficient number, since it is larger than the sum of its proper divisors (3922431).

9720609 is a wasteful number, since it uses less digits than its factorization.

9720609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170559.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 9720609 is about 3117.7891205147. The cubic root of 9720609 is about 213.4180552710.

It can be divided in two parts, 97 and 20609, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 9720609 in words is "nine million, seven hundred twenty thousand, six hundred nine".