9720193865 has 8 divisors (see below), whose sum is σ = 11664836808. Its totient is φ = 7775752320.

The previous prime is 9720193841. The next prime is 9720193877. The reversal of 9720193865 is 5683910279.

It can be written as a sum of positive squares in 4 ways, for example, as 4639925689 + 5080268176 = 68117^2 + 71276^2 .

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

It is not a de Polignac number, because 9720193865 - 2¹⁰ = 9720192841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92879 + ... + 167531.

It is an arithmetic number, because the mean of its divisors is an integer number (1458104601).

Almost surely, 2^9720193865 is an apocalyptic number.

It is an amenable number.

9720193865 is a deficient number, since it is larger than the sum of its proper divisors (1944642943).

9720193865 is a wasteful number, since it uses less digits than its factorization.

9720193865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100699.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 9720193865 is about 98591.0435333758. The cubic root of 9720193865 is about 2134.1501710178.

The spelling of 9720193865 in words is "nine billion, seven hundred twenty million, one hundred ninety-three thousand, eight hundred sixty-five".