128217319 has 2 divisors, whose sum is σ = 128217320. Its totient is φ = 128217318.

The previous prime is 128217311. The next prime is 128217343. The reversal of 128217319 is 913712821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128217319 - 2³ = 128217311 is a prime.

It is a super-2 number, since 2×128217319² = 32879361783095522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128217311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64108659 + 64108660.

It is an arithmetic number, because the mean of its divisors is an integer number (64108660).

Almost surely, 2^128217319 is an apocalyptic number.

128217319 is a deficient number, since it is larger than the sum of its proper divisors (1).

128217319 is an equidigital number, since it uses as much as digits as its factorization.

128217319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 128217319 is about 11323.3086595747. The cubic root of 128217319 is about 504.2534720131.

The spelling of 128217319 in words is "one hundred twenty-eight million, two hundred seventeen thousand, three hundred nineteen".