206497835069 has 2 divisors, whose sum is σ = 206497835070. Its totient is φ = 206497835068.

The previous prime is 206497835039. The next prime is 206497835081. The reversal of 206497835069 is 960538794602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206452096900 + 45738169 = 454370^2 + 6763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206497835069 is a prime.

It is a super-2 number, since 2×206497835069² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206497834999 and 206497835017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206497835039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103248917534 + 103248917535.

It is an arithmetic number, because the mean of its divisors is an integer number (103248917535).

Almost surely, 2^206497835069 is an apocalyptic number.

It is an amenable number.

206497835069 is a deficient number, since it is larger than the sum of its proper divisors (1).

206497835069 is an equidigital number, since it uses as much as digits as its factorization.

206497835069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19595520, while the sum is 59.

The spelling of 206497835069 in words is "two hundred six billion, four hundred ninety-seven million, eight hundred thirty-five thousand, sixty-nine".