82385801209 has 2 divisors, whose sum is σ = 82385801210. Its totient is φ = 82385801208.

The previous prime is 82385801207. The next prime is 82385801243. The reversal of 82385801209 is 90210858328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75513391209 + 6872410000 = 274797^2 + 82900^2 .

It is a cyclic number.

It is not a de Polignac number, because 82385801209 - 2¹ = 82385801207 is a prime.

Together with 82385801207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82385801207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41192900604 + 41192900605.

It is an arithmetic number, because the mean of its divisors is an integer number (41192900605).

Almost surely, 2^82385801209 is an apocalyptic number.

It is an amenable number.

82385801209 is a deficient number, since it is larger than the sum of its proper divisors (1).

82385801209 is an equidigital number, since it uses as much as digits as its factorization.

82385801209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 82385801209 in words is "eighty-two billion, three hundred eighty-five million, eight hundred one thousand, two hundred nine".