127896889 has 2 divisors, whose sum is σ = 127896890. Its totient is φ = 127896888.

The previous prime is 127896887. The next prime is 127896893. The reversal of 127896889 is 988698721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120012025 + 7884864 = 10955^2 + 2808^2 .

It is a cyclic number.

It is not a de Polignac number, because 127896889 - 2¹ = 127896887 is a prime.

It is a super-2 number, since 2×127896889² = 32715228431756642, which contains 22 as substring.

Together with 127896887, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (127896883) 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, 63948444 + 63948445.

It is an arithmetic number, because the mean of its divisors is an integer number (63948445).

Almost surely, 2^127896889 is an apocalyptic number.

It is an amenable number.

127896889 is a deficient number, since it is larger than the sum of its proper divisors (1).

127896889 is an equidigital number, since it uses as much as digits as its factorization.

127896889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3483648, while the sum is 58.

The square root of 127896889 is about 11309.1506754486. The cubic root of 127896889 is about 503.8330588968.

The spelling of 127896889 in words is "one hundred twenty-seven million, eight hundred ninety-six thousand, eight hundred eighty-nine".