128918351 has 2 divisors, whose sum is σ = 128918352. Its totient is φ = 128918350.

The previous prime is 128918347. The next prime is 128918353. The reversal of 128918351 is 153819821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128918351 - 2² = 128918347 is a prime.

Together with 128918353, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128918353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64459175 + 64459176.

It is an arithmetic number, because the mean of its divisors is an integer number (64459176).

Almost surely, 2^128918351 is an apocalyptic number.

128918351 is a deficient number, since it is larger than the sum of its proper divisors (1).

128918351 is an equidigital number, since it uses as much as digits as its factorization.

128918351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 38.

The square root of 128918351 is about 11354.2217258604. The cubic root of 128918351 is about 505.1708091282.

The spelling of 128918351 in words is "one hundred twenty-eight million, nine hundred eighteen thousand, three hundred fifty-one".