127864171 has 2 divisors, whose sum is σ = 127864172. Its totient is φ = 127864170.

The previous prime is 127864147. The next prime is 127864183. The reversal of 127864171 is 171468721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 127864171 - 2⁷ = 127864043 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 127864171.

It is not a weakly prime, because it can be changed into another prime (127864141) 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, 63932085 + 63932086.

It is an arithmetic number, because the mean of its divisors is an integer number (63932086).

Almost surely, 2^127864171 is an apocalyptic number.

127864171 is a deficient number, since it is larger than the sum of its proper divisors (1).

127864171 is an equidigital number, since it uses as much as digits as its factorization.

127864171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 37.

The square root of 127864171 is about 11307.7040552006. The cubic root of 127864171 is about 503.7900924729.

The spelling of 127864171 in words is "one hundred twenty-seven million, eight hundred sixty-four thousand, one hundred seventy-one".