128276613 has 6 divisors (see below), whose sum is σ = 185288454. Its totient is φ = 85517736.

The previous prime is 128276579. The next prime is 128276627. The reversal of 128276613 is 316672821.

128276613 is a `hidden beast` number, since 12 + 8 + 27 + 6 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 70257924 + 58018689 = 8382^2 + 7617^2 .

It is not a de Polignac number, because 128276613 - 2²¹ = 126179461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128176613) 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 5 ways as a sum of consecutive naturals, for example, 7126470 + ... + 7126487.

It is an arithmetic number, because the mean of its divisors is an integer number (30881409).

Almost surely, 2^128276613 is an apocalyptic number.

It is an amenable number.

128276613 is a deficient number, since it is larger than the sum of its proper divisors (57011841).

128276613 is a wasteful number, since it uses less digits than its factorization.

128276613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14252963 (or 14252960 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 128276613 is about 11325.9265846111. The cubic root of 128276613 is about 504.3311905767.

The spelling of 128276613 in words is "one hundred twenty-eight million, two hundred seventy-six thousand, six hundred thirteen".