211068687593 has 2 divisors, whose sum is σ = 211068687594. Its totient is φ = 211068687592.

The previous prime is 211068687587. The next prime is 211068687629. The reversal of 211068687593 is 395786860112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136576810969 + 74491876624 = 369563^2 + 272932^2 .

It is a cyclic number.

It is not a de Polignac number, because 211068687593 - 2²⁰ = 211067639017 is a prime.

It is not a weakly prime, because it can be changed into another prime (211068687563) 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, 105534343796 + 105534343797.

It is an arithmetic number, because the mean of its divisors is an integer number (105534343797).

Almost surely, 2^211068687593 is an apocalyptic number.

It is an amenable number.

211068687593 is a deficient number, since it is larger than the sum of its proper divisors (1).

211068687593 is an equidigital number, since it uses as much as digits as its factorization.

211068687593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 211068687593 in words is "two hundred eleven billion, sixty-eight million, six hundred eighty-seven thousand, five hundred ninety-three".