127664913 has 16 divisors (see below), whose sum is σ = 176893952. Its totient is φ = 81810000.

The previous prime is 127664903. The next prime is 127664923. The reversal of 127664913 is 319466721.

It is an interprime number because it is at equal distance from previous prime (127664903) and next prime (127664923).

It is not a de Polignac number, because 127664913 - 2⁸ = 127664657 is a prime.

It is a super-2 number, since 2×127664913² = 32596660022595138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127664903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9498 + ... + 18588.

It is an arithmetic number, because the mean of its divisors is an integer number (11055872).

Almost surely, 2^127664913 is an apocalyptic number.

It is an amenable number.

127664913 is a deficient number, since it is larger than the sum of its proper divisors (49229039).

127664913 is a wasteful number, since it uses less digits than its factorization.

127664913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9276.

The product of its digits is 54432, while the sum is 39.

The square root of 127664913 is about 11298.8899012248. The cubic root of 127664913 is about 503.5282615120.

The spelling of 127664913 in words is "one hundred twenty-seven million, six hundred sixty-four thousand, nine hundred thirteen".