128336293 has 4 divisors (see below), whose sum is σ = 128393100. Its totient is φ = 128279488.

The previous prime is 128336261. The next prime is 128336303. The reversal of 128336293 is 392633821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78535044 + 49801249 = 8862^2 + 7057^2 .

It is a cyclic number.

It is not a de Polignac number, because 128336293 - 2⁵ = 128336261 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 (128336093) 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 3 ways as a sum of consecutive naturals, for example, 24868 + ... + 29581.

It is an arithmetic number, because the mean of its divisors is an integer number (32098275).

Almost surely, 2^128336293 is an apocalyptic number.

It is an amenable number.

128336293 is a deficient number, since it is larger than the sum of its proper divisors (56807).

128336293 is an equidigital number, since it uses as much as digits as its factorization.

128336293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56806.

The product of its digits is 46656, while the sum is 37.

The square root of 128336293 is about 11328.5609412670. The cubic root of 128336293 is about 504.4093909029.

The spelling of 128336293 in words is "one hundred twenty-eight million, three hundred thirty-six thousand, two hundred ninety-three".