9720085 has 8 divisors (see below), whose sum is σ = 11979576. Its totient is φ = 7565760.

The previous prime is 9720083. The next prime is 9720089. The reversal of 9720085 is 5800279.

It can be written as a sum of positive squares in 4 ways, for example, as 5948721 + 3771364 = 2439^2 + 1942^2 .

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

It is not a de Polignac number, because 9720085 - 2¹ = 9720083 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720083) 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, 26086 + ... + 26455.

It is an arithmetic number, because the mean of its divisors is an integer number (1497447).

Almost surely, 2^9720085 is an apocalyptic number.

It is an amenable number.

9720085 is a deficient number, since it is larger than the sum of its proper divisors (2259491).

9720085 is a wasteful number, since it uses less digits than its factorization.

9720085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52583.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 9720085 is about 3117.7050854755. The cubic root of 9720085 is about 213.4142203580.

The spelling of 9720085 in words is "nine million, seven hundred twenty thousand, eighty-five".