212168336717 has 2 divisors, whose sum is σ = 212168336718. Its totient is φ = 212168336716.

The previous prime is 212168336711. The next prime is 212168336789. The reversal of 212168336717 is 717633861212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176510057161 + 35658279556 = 420131^2 + 188834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212168336717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212168336711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106084168358 + 106084168359.

It is an arithmetic number, because the mean of its divisors is an integer number (106084168359).

Almost surely, 2^212168336717 is an apocalyptic number.

It is an amenable number.

212168336717 is a deficient number, since it is larger than the sum of its proper divisors (1).

212168336717 is an equidigital number, since it uses as much as digits as its factorization.

212168336717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The spelling of 212168336717 in words is "two hundred twelve billion, one hundred sixty-eight million, three hundred thirty-six thousand, seven hundred seventeen".