9723647977 has 2 divisors, whose sum is σ = 9723647978. Its totient is φ = 9723647976.

The previous prime is 9723647959. The next prime is 9723648023. The reversal of 9723647977 is 7797463279.

9723647977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9394261776 + 329386201 = 96924^2 + 18149^2 .

It is an emirp because it is prime and its reverse (7797463279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9723647977 - 2¹⁹ = 9723123689 is a prime.

It is not a weakly prime, because it can be changed into another prime (9723647957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4861823988 + 4861823989.

It is an arithmetic number, because the mean of its divisors is an integer number (4861823989).

Almost surely, 2^9723647977 is an apocalyptic number.

It is an amenable number.

9723647977 is a deficient number, since it is larger than the sum of its proper divisors (1).

9723647977 is an equidigital number, since it uses as much as digits as its factorization.

9723647977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28005264, while the sum is 61.

The square root of 9723647977 is about 98608.5593495818. The cubic root of 9723647977 is about 2134.4029341765.

The spelling of 9723647977 in words is "nine billion, seven hundred twenty-three million, six hundred forty-seven thousand, nine hundred seventy-seven".