127228438349 has 2 divisors, whose sum is σ = 127228438350. Its totient is φ = 127228438348.

The previous prime is 127228438307. The next prime is 127228438453. The reversal of 127228438349 is 943834822721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116405157124 + 10823281225 = 341182^2 + 104035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127228438349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 127228438349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127228438849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63614219174 + 63614219175.

It is an arithmetic number, because the mean of its divisors is an integer number (63614219175).

Almost surely, 2^127228438349 is an apocalyptic number.

It is an amenable number.

127228438349 is a deficient number, since it is larger than the sum of its proper divisors (1).

127228438349 is an equidigital number, since it uses as much as digits as its factorization.

127228438349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 53.

The spelling of 127228438349 in words is "one hundred twenty-seven billion, two hundred twenty-eight million, four hundred thirty-eight thousand, three hundred forty-nine".