972128797 has 2 divisors, whose sum is σ = 972128798. Its totient is φ = 972128796.

The previous prime is 972128779. The next prime is 972128813. The reversal of 972128797 is 797821279.

972128797 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 (972128779) 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., 758121156 + 214007641 = 27534^2 + 14629^2 .

It is an emirp because it is prime and its reverse (797821279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 972128797 - 2¹⁵ = 972096029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (972128747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486064398 + 486064399.

It is an arithmetic number, because the mean of its divisors is an integer number (486064399).

Almost surely, 2^972128797 is an apocalyptic number.

It is an amenable number.

972128797 is a deficient number, since it is larger than the sum of its proper divisors (1).

972128797 is an equidigital number, since it uses as much as digits as its factorization.

972128797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 52.

The square root of 972128797 is about 31178.9800506688. The cubic root of 972128797 is about 990.6219256500.

The spelling of 972128797 in words is "nine hundred seventy-two million, one hundred twenty-eight thousand, seven hundred ninety-seven".