127638107 has 2 divisors, whose sum is σ = 127638108. Its totient is φ = 127638106.

The previous prime is 127638101. The next prime is 127638127. The reversal of 127638107 is 701836721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127638107 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (127638101) 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, 63819053 + 63819054.

It is an arithmetic number, because the mean of its divisors is an integer number (63819054).

Almost surely, 2^127638107 is an apocalyptic number.

127638107 is a deficient number, since it is larger than the sum of its proper divisors (1).

127638107 is an equidigital number, since it uses as much as digits as its factorization.

127638107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 127638107 is about 11297.7036162222. The cubic root of 127638107 is about 503.4930168415.

The spelling of 127638107 in words is "one hundred twenty-seven million, six hundred thirty-eight thousand, one hundred seven".