206706605089 has 2 divisors, whose sum is σ = 206706605090. Its totient is φ = 206706605088.

The previous prime is 206706605051. The next prime is 206706605107. The reversal of 206706605089 is 980506607602.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201257212689 + 5449392400 = 448617^2 + 73820^2 .

It is a cyclic number.

It is not a de Polignac number, because 206706605089 - 2¹⁵ = 206706572321 is a prime.

It is not a weakly prime, because it can be changed into another prime (206706665089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103353302544 + 103353302545.

It is an arithmetic number, because the mean of its divisors is an integer number (103353302545).

Almost surely, 2^206706605089 is an apocalyptic number.

It is an amenable number.

206706605089 is a deficient number, since it is larger than the sum of its proper divisors (1).

206706605089 is an equidigital number, since it uses as much as digits as its factorization.

206706605089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 206706605089 in words is "two hundred six billion, seven hundred six million, six hundred five thousand, eighty-nine".