212083709 has 2 divisors, whose sum is σ = 212083710. Its totient is φ = 212083708.

The previous prime is 212083691. The next prime is 212083717. The reversal of 212083709 is 907380212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179479609 + 32604100 = 13397^2 + 5710^2 .

It is a cyclic number.

It is not a de Polignac number, because 212083709 - 2²⁰ = 211035133 is a prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106041854 + 106041855.

It is an arithmetic number, because the mean of its divisors is an integer number (106041855).

Almost surely, 2^212083709 is an apocalyptic number.

It is an amenable number.

212083709 is a deficient number, since it is larger than the sum of its proper divisors (1).

212083709 is an equidigital number, since it uses as much as digits as its factorization.

212083709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 212083709 is about 14563.0940737194. The cubic root of 212083709 is about 596.3516656877.

The spelling of 212083709 in words is "two hundred twelve million, eighty-three thousand, seven hundred nine".