209023197945559 has 2 divisors, whose sum is σ = 209023197945560. Its totient is φ = 209023197945558.

The previous prime is 209023197945427. The next prime is 209023197945563. The reversal of 209023197945559 is 955549791320902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209023197945559 - 2²⁵ = 209023164391127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209023197940559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104511598972779 + 104511598972780.

It is an arithmetic number, because the mean of its divisors is an integer number (104511598972780).

Almost surely, 2^{209023197945559} is an apocalyptic number.

209023197945559 is a deficient number, since it is larger than the sum of its proper divisors (1).

209023197945559 is an equidigital number, since it uses as much as digits as its factorization.

209023197945559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562000, while the sum is 70.

The spelling of 209023197945559 in words is "two hundred nine trillion, twenty-three billion, one hundred ninety-seven million, nine hundred forty-five thousand, five hundred fifty-nine".