12108739309 has 2 divisors, whose sum is σ = 12108739310. Its totient is φ = 12108739308.

The previous prime is 12108739301. The next prime is 12108739337. The reversal of 12108739309 is 90393780121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11092723684 + 1016015625 = 105322^2 + 31875^2 .

It is a cyclic number.

It is not a de Polignac number, because 12108739309 - 2³ = 12108739301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12108739301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6054369654 + 6054369655.

It is an arithmetic number, because the mean of its divisors is an integer number (6054369655).

Almost surely, 2^12108739309 is an apocalyptic number.

It is an amenable number.

12108739309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12108739309 is an equidigital number, since it uses as much as digits as its factorization.

12108739309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The spelling of 12108739309 in words is "twelve billion, one hundred eight million, seven hundred thirty-nine thousand, three hundred nine".