12278438929 has 2 divisors, whose sum is σ = 12278438930. Its totient is φ = 12278438928.

The previous prime is 12278438891. The next prime is 12278438947. The reversal of 12278438929 is 92983487221.

12278438929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11252966400 + 1025472529 = 106080^2 + 32023^2 .

It is a cyclic number.

It is not a de Polignac number, because 12278438929 - 2¹³ = 12278430737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12278438929.

It is not a weakly prime, because it can be changed into another prime (12278438959) 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, 6139219464 + 6139219465.

It is an arithmetic number, because the mean of its divisors is an integer number (6139219465).

Almost surely, 2^12278438929 is an apocalyptic number.

It is an amenable number.

12278438929 is a deficient number, since it is larger than the sum of its proper divisors (1).

12278438929 is an equidigital number, since it uses as much as digits as its factorization.

12278438929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 55.

The spelling of 12278438929 in words is "twelve billion, two hundred seventy-eight million, four hundred thirty-eight thousand, nine hundred twenty-nine".