128397313 has 16 divisors (see below), whose sum is σ = 142401600. Its totient is φ = 114799680.

The previous prime is 128397233. The next prime is 128397331. The reversal of 128397313 is 313793821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128397313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128397713) 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 15 ways as a sum of consecutive naturals, for example, 207118 + ... + 207736.

It is an arithmetic number, because the mean of its divisors is an integer number (8900100).

Almost surely, 2^128397313 is an apocalyptic number.

It is an amenable number.

128397313 is a deficient number, since it is larger than the sum of its proper divisors (14004287).

128397313 is a wasteful number, since it uses less digits than its factorization.

128397313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912.

The product of its digits is 27216, while the sum is 37.

The square root of 128397313 is about 11331.2538141196. The cubic root of 128397313 is about 504.4893220054.

It can be divided in two parts, 1283 and 97313, that added together give a square (98596 = 314²).

The spelling of 128397313 in words is "one hundred twenty-eight million, three hundred ninety-seven thousand, three hundred thirteen".