212436340693 has 2 divisors, whose sum is σ = 212436340694. Its totient is φ = 212436340692.

The previous prime is 212436340639. The next prime is 212436340717. The reversal of 212436340693 is 396043634212.

Together with previous prime (212436340639) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140420324529 + 72016016164 = 374727^2 + 268358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212436340693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212436347693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106218170346 + 106218170347.

It is an arithmetic number, because the mean of its divisors is an integer number (106218170347).

Almost surely, 2^212436340693 is an apocalyptic number.

It is an amenable number.

212436340693 is a deficient number, since it is larger than the sum of its proper divisors (1).

212436340693 is an equidigital number, since it uses as much as digits as its factorization.

212436340693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 43.

The spelling of 212436340693 in words is "two hundred twelve billion, four hundred thirty-six million, three hundred forty thousand, six hundred ninety-three".