128586613 has 2 divisors, whose sum is σ = 128586614. Its totient is φ = 128586612.

The previous prime is 128586599. The next prime is 128586631. The reversal of 128586613 is 316685821.

Together with next prime (128586631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125955729 + 2630884 = 11223^2 + 1622^2 .

It is an emirp because it is prime and its reverse (316685821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128586613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128586683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64293306 + 64293307.

It is an arithmetic number, because the mean of its divisors is an integer number (64293307).

Almost surely, 2^128586613 is an apocalyptic number.

It is an amenable number.

128586613 is a deficient number, since it is larger than the sum of its proper divisors (1).

128586613 is an equidigital number, since it uses as much as digits as its factorization.

128586613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 128586613 is about 11339.6037408721. The cubic root of 128586613 is about 504.7371281629.

The spelling of 128586613 in words is "one hundred twenty-eight million, five hundred eighty-six thousand, six hundred thirteen".