128093321 has 2 divisors, whose sum is σ = 128093322. Its totient is φ = 128093320.

The previous prime is 128093293. The next prime is 128093323. The reversal of 128093321 is 123390821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119596096 + 8497225 = 10936^2 + 2915^2 .

It is an emirp because it is prime and its reverse (123390821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128093321 - 2⁶ = 128093257 is a prime.

Together with 128093323, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_7276061 and since 128093321 and 7276061 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (128093323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64046660 + 64046661.

It is an arithmetic number, because the mean of its divisors is an integer number (64046661).

Almost surely, 2^128093321 is an apocalyptic number.

It is an amenable number.

128093321 is a deficient number, since it is larger than the sum of its proper divisors (1).

128093321 is an equidigital number, since it uses as much as digits as its factorization.

128093321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 128093321 is about 11317.8319920381. The cubic root of 128093321 is about 504.0908663432.

The spelling of 128093321 in words is "one hundred twenty-eight million, ninety-three thousand, three hundred twenty-one".