127681689 has 8 divisors (see below), whose sum is σ = 170692960. Its totient is φ = 84895776.

The previous prime is 127681669. The next prime is 127681703. The reversal of 127681689 is 986186721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 127681689 - 2¹¹ = 127679641 is a prime.

It is a super-2 number, since 2×127681689² = 32605227411785442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127681669) 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 7 ways as a sum of consecutive naturals, for example, 55012 + ... + 57285.

It is an arithmetic number, because the mean of its divisors is an integer number (21336620).

Almost surely, 2^127681689 is an apocalyptic number.

It is an amenable number.

127681689 is a deficient number, since it is larger than the sum of its proper divisors (43011271).

127681689 is a wasteful number, since it uses less digits than its factorization.

127681689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112679.

The product of its digits is 290304, while the sum is 48.

The square root of 127681689 is about 11299.6322506531. The cubic root of 127681689 is about 503.5503161757.

The spelling of 127681689 in words is "one hundred twenty-seven million, six hundred eighty-one thousand, six hundred eighty-nine".