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806213 is a prime number
BaseRepresentation
bin11000100110101000101
31111221220202
43010311011
5201244323
625140245
76565322
oct3046505
91457822
10806213
115007a1
1232a685
13222c65
1416db49
1510dd28
hexc4d45

806213 has 2 divisors, whose sum is σ = 806214. Its totient is φ = 806212.

The previous prime is 806203. The next prime is 806233. The reversal of 806213 is 312608.

It is an a-pointer prime, because the next prime (806233) can be obtained adding 806213 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 717409 + 88804 = 847^2 + 298^2 .

It is a cyclic number.

It is not a de Polignac number, because 806213 - 214 = 789829 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 (806203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403106 + 403107.

It is an arithmetic number, because the mean of its divisors is an integer number (403107).

2806213 is an apocalyptic number.

It is an amenable number.

806213 is a deficient number, since it is larger than the sum of its proper divisors (1).

806213 is an equidigital number, since it uses as much as digits as its factorization.

806213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 806213 is about 897.8936462633. The cubic root of 806213 is about 93.0714754806.

The spelling of 806213 in words is "eight hundred six thousand, two hundred thirteen".