9728236997 has 2 divisors, whose sum is σ = 9728236998. Its totient is φ = 9728236996.

The previous prime is 9728236979. The next prime is 9728237011. The reversal of 9728236997 is 7996328279.

9728236997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (9728236979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7142616196 + 2585620801 = 84514^2 + 50849^2 .

It is an emirp because it is prime and its reverse (7996328279) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9728236997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9728236097) 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, 4864118498 + 4864118499.

It is an arithmetic number, because the mean of its divisors is an integer number (4864118499).

Almost surely, 2^9728236997 is an apocalyptic number.

It is an amenable number.

9728236997 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728236997 is an equidigital number, since it uses as much as digits as its factorization.

9728236997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 62.

The square root of 9728236997 is about 98631.8254773782. The cubic root of 9728236997 is about 2134.7386544504.

The spelling of 9728236997 in words is "nine billion, seven hundred twenty-eight million, two hundred thirty-six thousand, nine hundred ninety-seven".