127428458309 has 2 divisors, whose sum is σ = 127428458310. Its totient is φ = 127428458308.

The previous prime is 127428458279. The next prime is 127428458323. The reversal of 127428458309 is 903854824721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85176422500 + 42252035809 = 291850^2 + 205553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127428458309 is a prime.

It is a super-2 number, since 2×127428458309² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127428452309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63714229154 + 63714229155.

It is an arithmetic number, because the mean of its divisors is an integer number (63714229155).

Almost surely, 2^127428458309 is an apocalyptic number.

It is an amenable number.

127428458309 is a deficient number, since it is larger than the sum of its proper divisors (1).

127428458309 is an equidigital number, since it uses as much as digits as its factorization.

127428458309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 127428458309 in words is "one hundred twenty-seven billion, four hundred twenty-eight million, four hundred fifty-eight thousand, three hundred nine".