12705839291 has 2 divisors, whose sum is σ = 12705839292. Its totient is φ = 12705839290.

The previous prime is 12705839269. The next prime is 12705839303. The reversal of 12705839291 is 19293850721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12705839291 - 2³⁰ = 11632097467 is a prime.

It is a super-2 number, since 2×12705839291² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12705839221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352919645 + 6352919646.

It is an arithmetic number, because the mean of its divisors is an integer number (6352919646).

Almost surely, 2^12705839291 is an apocalyptic number.

12705839291 is a deficient number, since it is larger than the sum of its proper divisors (1).

12705839291 is an equidigital number, since it uses as much as digits as its factorization.

12705839291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 12705839291 in words is "twelve billion, seven hundred five million, eight hundred thirty-nine thousand, two hundred ninety-one".