128680193 has 4 divisors (see below), whose sum is σ = 134275008. Its totient is φ = 123085380.

The previous prime is 128680091. The next prime is 128680231. The reversal of 128680193 is 391086821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 391086821 = 16691 ⋅23431.

It is a cyclic number.

It is not a de Polignac number, because 128680193 - 2¹⁴ = 128663809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128683193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2797373 + ... + 2797418.

It is an arithmetic number, because the mean of its divisors is an integer number (33568752).

Almost surely, 2^128680193 is an apocalyptic number.

It is an amenable number.

128680193 is a deficient number, since it is larger than the sum of its proper divisors (5594815).

128680193 is an equidigital number, since it uses as much as digits as its factorization.

128680193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5594814.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 128680193 is about 11343.7292368956. The cubic root of 128680193 is about 504.8595407164.

The spelling of 128680193 in words is "one hundred twenty-eight million, six hundred eighty thousand, one hundred ninety-three".