127664347 has 4 divisors (see below), whose sum is σ = 128639016. Its totient is φ = 126689680.

The previous prime is 127664297. The next prime is 127664353. The reversal of 127664347 is 743466721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 743466721 = 3041 ⋅244481.

It is a cyclic number.

It is not a de Polignac number, because 127664347 - 2⁷ = 127664219 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 (127664357) 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 in 3 ways as a sum of consecutive naturals, for example, 487138 + ... + 487399.

It is an arithmetic number, because the mean of its divisors is an integer number (32159754).

Almost surely, 2^127664347 is an apocalyptic number.

127664347 is a deficient number, since it is larger than the sum of its proper divisors (974669).

127664347 is an equidigital number, since it uses as much as digits as its factorization.

127664347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974668.

The product of its digits is 169344, while the sum is 40.

The square root of 127664347 is about 11298.8648544887. The cubic root of 127664347 is about 503.5275173832.

The spelling of 127664347 in words is "one hundred twenty-seven million, six hundred sixty-four thousand, three hundred forty-seven".