209359646103913 has 2 divisors, whose sum is σ = 209359646103914. Its totient is φ = 209359646103912.

The previous prime is 209359646103863. The next prime is 209359646104013. The reversal of 209359646103913 is 319301646953902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145776453259264 + 63583192844649 = 12073792^2 + 7973907^2 .

It is a cyclic number.

It is not a de Polignac number, because 209359646103913 - 2⁹ = 209359646103401 is a prime.

It is a super-2 number, since 2×209359646103913² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (209359646103313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104679823051956 + 104679823051957.

It is an arithmetic number, because the mean of its divisors is an integer number (104679823051957).

Almost surely, 2^{209359646103913} is an apocalyptic number.

It is an amenable number.

209359646103913 is a deficient number, since it is larger than the sum of its proper divisors (1).

209359646103913 is an equidigital number, since it uses as much as digits as its factorization.

209359646103913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28343520, while the sum is 61.

The spelling of 209359646103913 in words is "two hundred nine trillion, three hundred fifty-nine billion, six hundred forty-six million, one hundred three thousand, nine hundred thirteen".