209471264397313 has 2 divisors, whose sum is σ = 209471264397314. Its totient is φ = 209471264397312.

The previous prime is 209471264397259. The next prime is 209471264397331. The reversal of 209471264397313 is 313793462174902.

It is a happy number.

Together with next prime (209471264397331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203342238275344 + 6129026121969 = 14259812^2 + 2475687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209471264397313 is a prime.

It is not a weakly prime, because it can be changed into another prime (209471264397413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104735632198656 + 104735632198657.

It is an arithmetic number, because the mean of its divisors is an integer number (104735632198657).

Almost surely, 2^{209471264397313} is an apocalyptic number.

It is an amenable number.

209471264397313 is a deficient number, since it is larger than the sum of its proper divisors (1).

209471264397313 is an equidigital number, since it uses as much as digits as its factorization.

209471264397313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41150592, while the sum is 61.

The spelling of 209471264397313 in words is "two hundred nine trillion, four hundred seventy-one billion, two hundred sixty-four million, three hundred ninety-seven thousand, three hundred thirteen".