209023197940559 has 2 divisors, whose sum is σ = 209023197940560. Its totient is φ = 209023197940558.

The previous prime is 209023197940511. The next prime is 209023197940597. The reversal of 209023197940559 is 955049791320902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209023197940559 - 2¹² = 209023197936463 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209023197940495 and 209023197940504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209023197940759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104511598970279 + 104511598970280.

It is an arithmetic number, because the mean of its divisors is an integer number (104511598970280).

Almost surely, 2^{209023197940559} is an apocalyptic number.

209023197940559 is a deficient number, since it is larger than the sum of its proper divisors (1).

209023197940559 is an equidigital number, since it uses as much as digits as its factorization.

209023197940559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55112400, while the sum is 65.

The spelling of 209023197940559 in words is "two hundred nine trillion, twenty-three billion, one hundred ninety-seven million, nine hundred forty thousand, five hundred fifty-nine".