206302136197 has 2 divisors, whose sum is σ = 206302136198. Its totient is φ = 206302136196.

The previous prime is 206302136149. The next prime is 206302136269. The reversal of 206302136197 is 791631203602.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168691739841 + 37610396356 = 410721^2 + 193934^2 .

It is a cyclic number.

It is not a de Polignac number, because 206302136197 - 2²⁷ = 206167918469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206302136147) 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, 103151068098 + 103151068099.

It is an arithmetic number, because the mean of its divisors is an integer number (103151068099).

Almost surely, 2^206302136197 is an apocalyptic number.

It is an amenable number.

206302136197 is a deficient number, since it is larger than the sum of its proper divisors (1).

206302136197 is an equidigital number, since it uses as much as digits as its factorization.

206302136197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

Adding to 206302136197 its reverse (791631203602), we get a palindrome (997933339799).

The spelling of 206302136197 in words is "two hundred six billion, three hundred two million, one hundred thirty-six thousand, one hundred ninety-seven".