206998073 has 2 divisors, whose sum is σ = 206998074. Its totient is φ = 206998072.

The previous prime is 206998061. The next prime is 206998109. The reversal of 206998073 is 370899602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186131449 + 20866624 = 13643^2 + 4568^2 .

It is a cyclic number.

It is not a de Polignac number, because 206998073 - 2¹² = 206993977 is a prime.

It is not a weakly prime, because it can be changed into another prime (206998013) 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, 103499036 + 103499037.

It is an arithmetic number, because the mean of its divisors is an integer number (103499037).

Almost surely, 2^206998073 is an apocalyptic number.

It is an amenable number.

206998073 is a deficient number, since it is larger than the sum of its proper divisors (1).

206998073 is an equidigital number, since it uses as much as digits as its factorization.

206998073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 206998073 is about 14387.4276019030. The cubic root of 206998073 is about 591.5463343552.

The spelling of 206998073 in words is "two hundred six million, nine hundred ninety-eight thousand, seventy-three".