209738920776323 has 2 divisors, whose sum is σ = 209738920776324. Its totient is φ = 209738920776322.

The previous prime is 209738920776269. The next prime is 209738920776397. The reversal of 209738920776323 is 323677029837902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 209738920776323 - 2²⁶ = 209738853667459 is a prime.

It is not a weakly prime, because it can be changed into another prime (209738920772323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104869460388161 + 104869460388162.

It is an arithmetic number, because the mean of its divisors is an integer number (104869460388162).

Almost surely, 2^{209738920776323} is an apocalyptic number.

209738920776323 is a deficient number, since it is larger than the sum of its proper divisors (1).

209738920776323 is an equidigital number, since it uses as much as digits as its factorization.

209738920776323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288054144, while the sum is 68.

The spelling of 209738920776323 in words is "two hundred nine trillion, seven hundred thirty-eight billion, nine hundred twenty million, seven hundred seventy-six thousand, three hundred twenty-three".