1179209109109 has 2 divisors, whose sum is σ = 1179209109110. Its totient is φ = 1179209109108.

The previous prime is 1179209108989. The next prime is 1179209109139. The reversal of 1179209109109 is 9019019029711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1161685174225 + 17523934884 = 1077815^2 + 132378^2 .

It is an emirp because it is prime and its reverse (9019019029711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1179209109109 - 2²⁹ = 1178672238197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1179209109139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589604554554 + 589604554555.

It is an arithmetic number, because the mean of its divisors is an integer number (589604554555).

Almost surely, 2^{1179209109109} is an apocalyptic number.

It is an amenable number.

1179209109109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1179209109109 is an equidigital number, since it uses as much as digits as its factorization.

1179209109109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 49.

The spelling of 1179209109109 in words is "one trillion, one hundred seventy-nine billion, two hundred nine million, one hundred nine thousand, one hundred nine".