127922881 has 2 divisors, whose sum is σ = 127922882. Its totient is φ = 127922880.

The previous prime is 127922869. The next prime is 127922897. The reversal of 127922881 is 188229721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116640000 + 11282881 = 10800^2 + 3359^2 .

It is an emirp because it is prime and its reverse (188229721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127922881 - 2⁹ = 127922369 is a prime.

It is a super-2 number, since 2×127922881² = 32728526966680322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (127922831) 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, 63961440 + 63961441.

It is an arithmetic number, because the mean of its divisors is an integer number (63961441).

Almost surely, 2^127922881 is an apocalyptic number.

It is an amenable number.

127922881 is a deficient number, since it is larger than the sum of its proper divisors (1).

127922881 is an equidigital number, since it uses as much as digits as its factorization.

127922881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 40.

The square root of 127922881 is about 11310.2997749839. The cubic root of 127922881 is about 503.8671872793.

The spelling of 127922881 in words is "one hundred twenty-seven million, nine hundred twenty-two thousand, eight hundred eighty-one".