127647139 has 4 divisors (see below), whose sum is σ = 127695240. Its totient is φ = 127599040.

The previous prime is 127647109. The next prime is 127647167. The reversal of 127647139 is 931746721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931746721 = 23 ⋅40510727.

It is a cyclic number.

It is not a de Polignac number, because 127647139 - 2⁷ = 127647011 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127647109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19822 + ... + 25459.

It is an arithmetic number, because the mean of its divisors is an integer number (31923810).

Almost surely, 2^127647139 is an apocalyptic number.

127647139 is a deficient number, since it is larger than the sum of its proper divisors (48101).

127647139 is an equidigital number, since it uses as much as digits as its factorization.

127647139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48100.

The product of its digits is 63504, while the sum is 40.

The square root of 127647139 is about 11298.1033364012. The cubic root of 127647139 is about 503.5048927140.

The spelling of 127647139 in words is "one hundred twenty-seven million, six hundred forty-seven thousand, one hundred thirty-nine".