9842816729 has 2 divisors, whose sum is σ = 9842816730. Its totient is φ = 9842816728.

The previous prime is 9842816663. The next prime is 9842816761. The reversal of 9842816729 is 9276182489.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7857936025 + 1984880704 = 88645^2 + 44552^2 .

It is a cyclic number.

It is not a de Polignac number, because 9842816729 - 2²⁸ = 9574381273 is a prime.

It is not a weakly prime, because it can be changed into another prime (9842816329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4921408364 + 4921408365.

It is an arithmetic number, because the mean of its divisors is an integer number (4921408365).

Almost surely, 2^9842816729 is an apocalyptic number.

It is an amenable number.

9842816729 is a deficient number, since it is larger than the sum of its proper divisors (1).

9842816729 is an equidigital number, since it uses as much as digits as its factorization.

9842816729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 56.

The square root of 9842816729 is about 99210.9708096841. The cubic root of 9842816729 is about 2143.0869886888.

The spelling of 9842816729 in words is "nine billion, eight hundred forty-two million, eight hundred sixteen thousand, seven hundred twenty-nine".