212018693 has 2 divisors, whose sum is σ = 212018694. Its totient is φ = 212018692.

The previous prime is 212018687. The next prime is 212018707. The reversal of 212018693 is 396810212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159340129 + 52678564 = 12623^2 + 7258^2 .

It is a cyclic number.

It is not a de Polignac number, because 212018693 - 2⁶ = 212018629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212018633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106009346 + 106009347.

It is an arithmetic number, because the mean of its divisors is an integer number (106009347).

Almost surely, 2^212018693 is an apocalyptic number.

It is an amenable number.

212018693 is a deficient number, since it is larger than the sum of its proper divisors (1).

212018693 is an equidigital number, since it uses as much as digits as its factorization.

212018693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 212018693 is about 14560.8616846669. The cubic root of 212018693 is about 596.2907206286.

The spelling of 212018693 in words is "two hundred twelve million, eighteen thousand, six hundred ninety-three".