206824489 has 2 divisors, whose sum is σ = 206824490. Its totient is φ = 206824488.

The previous prime is 206824447. The next prime is 206824507. The reversal of 206824489 is 984428602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108160000 + 98664489 = 10400^2 + 9933^2 .

It is a cyclic number.

It is not a de Polignac number, because 206824489 - 2¹⁹ = 206300201 is a prime.

It is a super-2 number, since 2×206824489² = 85552738500222242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (206824439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103412244 + 103412245.

It is an arithmetic number, because the mean of its divisors is an integer number (103412245).

Almost surely, 2^206824489 is an apocalyptic number.

It is an amenable number.

206824489 is a deficient number, since it is larger than the sum of its proper divisors (1).

206824489 is an equidigital number, since it uses as much as digits as its factorization.

206824489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 206824489 is about 14381.3938476074. The cubic root of 206824489 is about 591.3809355613.

The spelling of 206824489 in words is "two hundred six million, eight hundred twenty-four thousand, four hundred eighty-nine".