206239929089 has 2 divisors, whose sum is σ = 206239929090. Its totient is φ = 206239929088.

The previous prime is 206239929079. The next prime is 206239929113. The reversal of 206239929089 is 980929932602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105391129600 + 100848799489 = 324640^2 + 317567^2 .

It is a cyclic number.

It is not a de Polignac number, because 206239929089 - 2⁴ = 206239929073 is a prime.

It is not a weakly prime, because it can be changed into another prime (206239929079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103119964544 + 103119964545.

It is an arithmetic number, because the mean of its divisors is an integer number (103119964545).

Almost surely, 2^206239929089 is an apocalyptic number.

It is an amenable number.

206239929089 is a deficient number, since it is larger than the sum of its proper divisors (1).

206239929089 is an equidigital number, since it uses as much as digits as its factorization.

206239929089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7558272, while the sum is 59.

The spelling of 206239929089 in words is "two hundred six billion, two hundred thirty-nine million, nine hundred twenty-nine thousand, eighty-nine".