9720071 has 4 divisors (see below), whose sum is σ = 9754944. Its totient is φ = 9685200.

The previous prime is 9720043. The next prime is 9720083. The reversal of 9720071 is 1700279.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9720071 - 2¹⁸ = 9457927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9720071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17015 + ... + 17576.

It is an arithmetic number, because the mean of its divisors is an integer number (2438736).

Almost surely, 2^9720071 is an apocalyptic number.

9720071 is a deficient number, since it is larger than the sum of its proper divisors (34873).

9720071 is a wasteful number, since it uses less digits than its factorization.

9720071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34872.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 9720071 is about 3117.7028402335. The cubic root of 9720071 is about 213.4141178966.

The spelling of 9720071 in words is "nine million, seven hundred twenty thousand, seventy-one".