128314331 has 2 divisors, whose sum is σ = 128314332. Its totient is φ = 128314330.

The previous prime is 128314327. The next prime is 128314393. The reversal of 128314331 is 133413821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128314331 - 2² = 128314327 is a prime.

It is a super-2 number, since 2×128314331² = 32929135079955122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128314331.

It is not a weakly prime, because it can be changed into another prime (128314031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64157165 + 64157166.

It is an arithmetic number, because the mean of its divisors is an integer number (64157166).

Almost surely, 2^128314331 is an apocalyptic number.

128314331 is a deficient number, since it is larger than the sum of its proper divisors (1).

128314331 is an equidigital number, since it uses as much as digits as its factorization.

128314331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 128314331 is about 11327.5915798549. The cubic root of 128314331 is about 504.3806163172.

The spelling of 128314331 in words is "one hundred twenty-eight million, three hundred fourteen thousand, three hundred thirty-one".