127390689 has 6 divisors (see below), whose sum is σ = 184008786. Its totient is φ = 84927120.

The previous prime is 127390661. The next prime is 127390693. The reversal of 127390689 is 986093721.

It can be written as a sum of positive squares in only one way, i.e., 112529664 + 14861025 = 10608^2 + 3855^2 .

It is not a de Polignac number, because 127390689 - 2⁹ = 127390177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127390619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7077252 + ... + 7077269.

It is an arithmetic number, because the mean of its divisors is an integer number (30668131).

Almost surely, 2^127390689 is an apocalyptic number.

It is an amenable number.

127390689 is a deficient number, since it is larger than the sum of its proper divisors (56618097).

127390689 is a wasteful number, since it uses less digits than its factorization.

127390689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14154527 (or 14154524 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 127390689 is about 11286.7483802909. The cubic root of 127390689 is about 503.1674771385.

The spelling of 127390689 in words is "one hundred twenty-seven million, three hundred ninety thousand, six hundred eighty-nine".