1179317809309 has 2 divisors, whose sum is σ = 1179317809310. Its totient is φ = 1179317809308.

The previous prime is 1179317809273. The next prime is 1179317809337. The reversal of 1179317809309 is 9039087139711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 652355059225 + 526962750084 = 807685^2 + 725922^2 .

It is an emirp because it is prime and its reverse (9039087139711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1179317809309 - 2⁷ = 1179317809181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1179317809009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589658904654 + 589658904655.

It is an arithmetic number, because the mean of its divisors is an integer number (589658904655).

Almost surely, 2^{1179317809309} is an apocalyptic number.

It is an amenable number.

1179317809309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1179317809309 is an equidigital number, since it uses as much as digits as its factorization.

1179317809309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 58.

The spelling of 1179317809309 in words is "one trillion, one hundred seventy-nine billion, three hundred seventeen million, eight hundred nine thousand, three hundred nine".