12257091709 has 2 divisors, whose sum is σ = 12257091710. Its totient is φ = 12257091708.

The previous prime is 12257091701. The next prime is 12257091731. The reversal of 12257091709 is 90719075221.

12257091709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9805356484 + 2451735225 = 99022^2 + 49515^2 .

It is a cyclic number.

It is not a de Polignac number, because 12257091709 - 2³ = 12257091701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12257091701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128545854 + 6128545855.

It is an arithmetic number, because the mean of its divisors is an integer number (6128545855).

Almost surely, 2^12257091709 is an apocalyptic number.

It is an amenable number.

12257091709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12257091709 is an equidigital number, since it uses as much as digits as its factorization.

12257091709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 43.

The spelling of 12257091709 in words is "twelve billion, two hundred fifty-seven million, ninety-one thousand, seven hundred nine".