212085708677 has 2 divisors, whose sum is σ = 212085708678. Its totient is φ = 212085708676.

The previous prime is 212085708673. The next prime is 212085708719. The reversal of 212085708677 is 776807580212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184392089281 + 27693619396 = 429409^2 + 166414^2 .

It is a cyclic number.

It is not a de Polignac number, because 212085708677 - 2² = 212085708673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212085708673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106042854338 + 106042854339.

It is an arithmetic number, because the mean of its divisors is an integer number (106042854339).

Almost surely, 2^212085708677 is an apocalyptic number.

It is an amenable number.

212085708677 is a deficient number, since it is larger than the sum of its proper divisors (1).

212085708677 is an equidigital number, since it uses as much as digits as its factorization.

212085708677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2634240, while the sum is 53.

The spelling of 212085708677 in words is "two hundred twelve billion, eighty-five million, seven hundred eight thousand, six hundred seventy-seven".