128411613 has 18 divisors (see below), whose sum is σ = 203880222. Its totient is φ = 77824560.

The previous prime is 128411609. The next prime is 128411617. The reversal of 128411613 is 316114821.

It is a happy number.

128411613 is a `hidden beast` number, since 1 + 2 + 8 + 41 + 1 + 613 = 666.

It is an interprime number because it is at equal distance from previous prime (128411609) and next prime (128411617).

It can be written as a sum of positive squares in only one way, i.e., 107371044 + 21040569 = 10362^2 + 4587^2 .

It is not a de Polignac number, because 128411613 - 2² = 128411609 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128411617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 57870 + ... + 60047.

It is an arithmetic number, because the mean of its divisors is an integer number (11326679).

Almost surely, 2^128411613 is an apocalyptic number.

It is an amenable number.

128411613 is a deficient number, since it is larger than the sum of its proper divisors (75468609).

128411613 is a wasteful number, since it uses less digits than its factorization.

128411613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117945 (or 117931 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 128411613 is about 11331.8847946844. The cubic root of 128411613 is about 504.5080501478.

The spelling of 128411613 in words is "one hundred twenty-eight million, four hundred eleven thousand, six hundred thirteen".