127228889 has 2 divisors, whose sum is σ = 127228890. Its totient is φ = 127228888.

The previous prime is 127228877. The next prime is 127228897. The reversal of 127228889 is 988822721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71233600 + 55995289 = 8440^2 + 7483^2 .

It is an emirp because it is prime and its reverse (988822721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127228889 - 2¹⁶ = 127163353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127228489) 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, 63614444 + 63614445.

It is an arithmetic number, because the mean of its divisors is an integer number (63614445).

Almost surely, 2^127228889 is an apocalyptic number.

It is an amenable number.

127228889 is a deficient number, since it is larger than the sum of its proper divisors (1).

127228889 is an equidigital number, since it uses as much as digits as its factorization.

127228889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 47.

The square root of 127228889 is about 11279.5784052419. The cubic root of 127228889 is about 502.9543611189.

The spelling of 127228889 in words is "one hundred twenty-seven million, two hundred twenty-eight thousand, eight hundred eighty-nine".