128932613 has 8 divisors (see below), whose sum is σ = 136291200. Its totient is φ = 121631328.

The previous prime is 128932597. The next prime is 128932621. The reversal of 128932613 is 316239821.

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

It is a cyclic number.

It is not a de Polignac number, because 128932613 - 2⁴ = 128932597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128932693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9656 + ... + 18737.

It is an arithmetic number, because the mean of its divisors is an integer number (17036400).

Almost surely, 2^128932613 is an apocalyptic number.

It is an amenable number.

128932613 is a deficient number, since it is larger than the sum of its proper divisors (7358587).

128932613 is a wasteful number, since it uses less digits than its factorization.

128932613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28651.

The product of its digits is 15552, while the sum is 35.

The square root of 128932613 is about 11354.8497568220. The cubic root of 128932613 is about 505.1894371470.

The spelling of 128932613 in words is "one hundred twenty-eight million, nine hundred thirty-two thousand, six hundred thirteen".