127668811 has 2 divisors, whose sum is σ = 127668812. Its totient is φ = 127668810.

The previous prime is 127668799. The next prime is 127668829. The reversal of 127668811 is 118866721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 127668811 - 2¹⁵ = 127636043 is a prime.

It is not a weakly prime, because it can be changed into another prime (127668311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63834405 + 63834406.

It is an arithmetic number, because the mean of its divisors is an integer number (63834406).

Almost surely, 2^127668811 is an apocalyptic number.

127668811 is a deficient number, since it is larger than the sum of its proper divisors (1).

127668811 is an equidigital number, since it uses as much as digits as its factorization.

127668811 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 127668811 is about 11299.0623947299. The cubic root of 127668811 is about 503.5333862122.

The spelling of 127668811 in words is "one hundred twenty-seven million, six hundred sixty-eight thousand, eight hundred eleven".