447838838729 has 2 divisors, whose sum is σ = 447838838730. Its totient is φ = 447838838728.

The previous prime is 447838838723. The next prime is 447838838767. The reversal of 447838838729 is 927838838744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256846240000 + 190992598729 = 506800^2 + 437027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447838838729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (447838838723) 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, 223919419364 + 223919419365.

It is an arithmetic number, because the mean of its divisors is an integer number (223919419365).

Almost surely, 2^447838838729 is an apocalyptic number.

It is an amenable number.

447838838729 is a deficient number, since it is larger than the sum of its proper divisors (1).

447838838729 is an equidigital number, since it uses as much as digits as its factorization.

447838838729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 520224768, while the sum is 71.

The spelling of 447838838729 in words is "four hundred forty-seven billion, eight hundred thirty-eight million, eight hundred thirty-eight thousand, seven hundred twenty-nine".