128217343 has 2 divisors, whose sum is σ = 128217344. Its totient is φ = 128217342.

The previous prime is 128217319. The next prime is 128217359. The reversal of 128217343 is 343712821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128217343 - 2⁵ = 128217311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128217743) 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, 64108671 + 64108672.

It is an arithmetic number, because the mean of its divisors is an integer number (64108672).

Almost surely, 2^128217343 is an apocalyptic number.

128217343 is a deficient number, since it is larger than the sum of its proper divisors (1).

128217343 is an equidigital number, since it uses as much as digits as its factorization.

It is an anagram of its base 9 representation: 128217343 = (287233114)₉.

128217343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 31.

The square root of 128217343 is about 11323.3097193356. The cubic root of 128217343 is about 504.2535034755.

It can be divided in two parts, 12821 and 7343, that added together give a square (20164 = 142²).

The spelling of 128217343 in words is "one hundred twenty-eight million, two hundred seventeen thousand, three hundred forty-three".