206381996297 has 2 divisors, whose sum is σ = 206381996298. Its totient is φ = 206381996296.

The previous prime is 206381996239. The next prime is 206381996299. The reversal of 206381996297 is 792699183602.

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., 198219957961 + 8162038336 = 445219^2 + 90344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206381996297 is a prime.

Together with 206381996299, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206381996299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103190998148 + 103190998149.

It is an arithmetic number, because the mean of its divisors is an integer number (103190998149).

Almost surely, 2^206381996297 is an apocalyptic number.

It is an amenable number.

206381996297 is a deficient number, since it is larger than the sum of its proper divisors (1).

206381996297 is an equidigital number, since it uses as much as digits as its factorization.

206381996297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17635968, while the sum is 62.

The spelling of 206381996297 in words is "two hundred six billion, three hundred eighty-one million, nine hundred ninety-six thousand, two hundred ninety-seven".