82861394393 has 2 divisors, whose sum is σ = 82861394394. Its totient is φ = 82861394392.

The previous prime is 82861394309. The next prime is 82861394423. The reversal of 82861394393 is 39349316828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74440028569 + 8421365824 = 272837^2 + 91768^2 .

It is a cyclic number.

It is not a de Polignac number, because 82861394393 - 2²² = 82857200089 is a prime.

It is not a weakly prime, because it can be changed into another prime (82861394303) 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, 41430697196 + 41430697197.

It is an arithmetic number, because the mean of its divisors is an integer number (41430697197).

Almost surely, 2^82861394393 is an apocalyptic number.

It is an amenable number.

82861394393 is a deficient number, since it is larger than the sum of its proper divisors (1).

82861394393 is an equidigital number, since it uses as much as digits as its factorization.

82861394393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The spelling of 82861394393 in words is "eighty-two billion, eight hundred sixty-one million, three hundred ninety-four thousand, three hundred ninety-three".