128985293 has 8 divisors (see below), whose sum is σ = 134645400. Its totient is φ = 123439680.

The previous prime is 128985287. The next prime is 128985299. The reversal of 128985293 is 392589821.

It is an interprime number because it is at equal distance from previous prime (128985287) and next prime (128985299).

It can be written as a sum of positive squares in 4 ways, for example, as 3844 + 128981449 = 62^2 + 11357^2 .

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 128985293 - 2⁸ = 128985037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128985299) 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 7 ways as a sum of consecutive naturals, for example, 26318 + ... + 30831.

It is an arithmetic number, because the mean of its divisors is an integer number (16830675).

Almost surely, 2^128985293 is an apocalyptic number.

It is an amenable number.

128985293 is a deficient number, since it is larger than the sum of its proper divisors (5660107).

128985293 is an equidigital number, since it uses as much as digits as its factorization.

128985293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57247.

The product of its digits is 311040, while the sum is 47.

The square root of 128985293 is about 11357.1692335722. The cubic root of 128985293 is about 505.2582321429.

The spelling of 128985293 in words is "one hundred twenty-eight million, nine hundred eighty-five thousand, two hundred ninety-three".