12309055691 has 2 divisors, whose sum is σ = 12309055692. Its totient is φ = 12309055690.

The previous prime is 12309055631. The next prime is 12309055699. The reversal of 12309055691 is 19655090321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12309055691 is a prime.

It is not a weakly prime, because it can be changed into another prime (12309055699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6154527845 + 6154527846.

It is an arithmetic number, because the mean of its divisors is an integer number (6154527846).

Almost surely, 2^12309055691 is an apocalyptic number.

12309055691 is a deficient number, since it is larger than the sum of its proper divisors (1).

12309055691 is an equidigital number, since it uses as much as digits as its factorization.

12309055691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72900, while the sum is 41.

The spelling of 12309055691 in words is "twelve billion, three hundred nine million, fifty-five thousand, six hundred ninety-one".