127138911 has 16 divisors (see below), whose sum is σ = 171494400. Its totient is φ = 83777760.

The previous prime is 127138897. The next prime is 127138927. The reversal of 127138911 is 119831721.

It is not a de Polignac number, because 127138911 - 2¹⁰ = 127137887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127138931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102666 + ... + 103896.

It is an arithmetic number, because the mean of its divisors is an integer number (10718400).

Almost surely, 2^127138911 is an apocalyptic number.

127138911 is a deficient number, since it is larger than the sum of its proper divisors (44355489).

127138911 is a wasteful number, since it uses less digits than its factorization.

127138911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606.

The product of its digits is 3024, while the sum is 33.

The square root of 127138911 is about 11275.5891642078. The cubic root of 127138911 is about 502.8357677702.

The spelling of 127138911 in words is "one hundred twenty-seven million, one hundred thirty-eight thousand, nine hundred eleven".