212783093 has 2 divisors, whose sum is σ = 212783094. Its totient is φ = 212783092.

The previous prime is 212783047. The next prime is 212783111. The reversal of 212783093 is 390387212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110712484 + 102070609 = 10522^2 + 10103^2 .

It is a cyclic number.

It is not a de Polignac number, because 212783093 - 2⁶ = 212783029 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 (212783003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106391546 + 106391547.

It is an arithmetic number, because the mean of its divisors is an integer number (106391547).

Almost surely, 2^212783093 is an apocalyptic number.

It is an amenable number.

212783093 is a deficient number, since it is larger than the sum of its proper divisors (1).

212783093 is an equidigital number, since it uses as much as digits as its factorization.

212783093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 212783093 is about 14587.0865151339. The cubic root of 212783093 is about 597.0064718951.

The spelling of 212783093 in words is "two hundred twelve million, seven hundred eighty-three thousand, ninety-three".