822712729 has 2 divisors, whose sum is σ = 822712730. Its totient is φ = 822712728.

The previous prime is 822712721. The next prime is 822712753. The reversal of 822712729 is 927217228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 790903129 + 31809600 = 28123^2 + 5640^2 .

It is a cyclic number.

It is not a de Polignac number, because 822712729 - 2³ = 822712721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 822712691 and 822712700.

It is not a weakly prime, because it can be changed into another prime (822712721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411356364 + 411356365.

It is an arithmetic number, because the mean of its divisors is an integer number (411356365).

Almost surely, 2^822712729 is an apocalyptic number.

It is an amenable number.

822712729 is a deficient number, since it is larger than the sum of its proper divisors (1).

822712729 is an equidigital number, since it uses as much as digits as its factorization.

822712729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 822712729 is about 28682.9693197897. The cubic root of 822712729 is about 937.0211756677.

The spelling of 822712729 in words is "eight hundred twenty-two million, seven hundred twelve thousand, seven hundred twenty-nine".