212675727689 has 2 divisors, whose sum is σ = 212675727690. Its totient is φ = 212675727688.

The previous prime is 212675727619. The next prime is 212675727713. The reversal of 212675727689 is 986727576212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206592975625 + 6082752064 = 454525^2 + 77992^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212675727689 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 (212675727619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106337863844 + 106337863845.

It is an arithmetic number, because the mean of its divisors is an integer number (106337863845).

Almost surely, 2^212675727689 is an apocalyptic number.

It is an amenable number.

212675727689 is a deficient number, since it is larger than the sum of its proper divisors (1).

212675727689 is an equidigital number, since it uses as much as digits as its factorization.

212675727689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35562240, while the sum is 62.

The spelling of 212675727689 in words is "two hundred twelve billion, six hundred seventy-five million, seven hundred twenty-seven thousand, six hundred eighty-nine".