9720647783 has 24 divisors (see below), whose sum is σ = 12371863680. Its totient is φ = 7574386680.

The previous prime is 9720647777. The next prime is 9720647813. The reversal of 9720647783 is 3877460279.

It is not a de Polignac number, because 9720647783 - 2⁴ = 9720647767 is a prime.

It is a super-2 number, since 2×9720647783² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720647743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158588 + ... + 211166.

It is an arithmetic number, because the mean of its divisors is an integer number (515494320).

Almost surely, 2^9720647783 is an apocalyptic number.

9720647783 is a deficient number, since it is larger than the sum of its proper divisors (2651215897).

9720647783 is an frugal number, since it uses more digits than its factorization.

9720647783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52625 (or 52597 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 53.

The square root of 9720647783 is about 98593.3455310246. The cubic root of 9720647783 is about 2134.1833910033.

The spelling of 9720647783 in words is "nine billion, seven hundred twenty million, six hundred forty-seven thousand, seven hundred eighty-three".