9772897789 has 2 divisors, whose sum is σ = 9772897790. Its totient is φ = 9772897788.

The previous prime is 9772897759. The next prime is 9772897807. The reversal of 9772897789 is 9877982779.

9772897789 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6875228889 + 2897668900 = 82917^2 + 53830^2 .

It is a cyclic number.

It is not a de Polignac number, because 9772897789 - 2²⁷ = 9638680061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9772897759) 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, 4886448894 + 4886448895.

It is an arithmetic number, because the mean of its divisors is an integer number (4886448895).

Almost surely, 2^9772897789 is an apocalyptic number.

It is an amenable number.

9772897789 is a deficient number, since it is larger than the sum of its proper divisors (1).

9772897789 is an equidigital number, since it uses as much as digits as its factorization.

9772897789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224042112, while the sum is 73.

The square root of 9772897789 is about 98857.9677567772. The cubic root of 9772897789 is about 2138.0004168996. Note that the first 3 decimals are identical.

The spelling of 9772897789 in words is "nine billion, seven hundred seventy-two million, eight hundred ninety-seven thousand, seven hundred eighty-nine".