206298640897 has 2 divisors, whose sum is σ = 206298640898. Its totient is φ = 206298640896.

The previous prime is 206298640883. The next prime is 206298640949. The reversal of 206298640897 is 798046892602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156939576336 + 49359064561 = 396156^2 + 222169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206298640897 is a prime.

It is not a weakly prime, because it can be changed into another prime (206298644897) 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, 103149320448 + 103149320449.

It is an arithmetic number, because the mean of its divisors is an integer number (103149320449).

Almost surely, 2^206298640897 is an apocalyptic number.

It is an amenable number.

206298640897 is a deficient number, since it is larger than the sum of its proper divisors (1).

206298640897 is an equidigital number, since it uses as much as digits as its factorization.

206298640897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 206298640897 in words is "two hundred six billion, two hundred ninety-eight million, six hundred forty thousand, eight hundred ninety-seven".