206012500997 has 2 divisors, whose sum is σ = 206012500998. Its totient is φ = 206012500996.

The previous prime is 206012500973. The next prime is 206012500999. The reversal of 206012500997 is 799005210602.

It is a Cunningham number, because it is equal to 453886²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206012500996 + 1 = 453886^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 206012500997 - 2¹⁸ = 206012238853 is a prime.

Together with 206012500999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206012500999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103006250498 + 103006250499.

It is an arithmetic number, because the mean of its divisors is an integer number (103006250499).

Almost surely, 2^206012500997 is an apocalyptic number.

It is an amenable number.

206012500997 is a deficient number, since it is larger than the sum of its proper divisors (1).

206012500997 is an equidigital number, since it uses as much as digits as its factorization.

206012500997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 206012500997 in words is "two hundred six billion, twelve million, five hundred thousand, nine hundred ninety-seven".