128215193 has 2 divisors, whose sum is σ = 128215194. Its totient is φ = 128215192.

The previous prime is 128215189. The next prime is 128215223. The reversal of 128215193 is 391512821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95804944 + 32410249 = 9788^2 + 5693^2 .

It is a cyclic number.

It is not a de Polignac number, because 128215193 - 2² = 128215189 is a prime.

It is not a weakly prime, because it can be changed into another prime (128215793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64107596 + 64107597.

It is an arithmetic number, because the mean of its divisors is an integer number (64107597).

Almost surely, 2^128215193 is an apocalyptic number.

It is an amenable number.

128215193 is a deficient number, since it is larger than the sum of its proper divisors (1).

128215193 is an equidigital number, since it uses as much as digits as its factorization.

128215193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 32.

The square root of 128215193 is about 11323.2147820308. The cubic root of 128215193 is about 504.2506849512.

The spelling of 128215193 in words is "one hundred twenty-eight million, two hundred fifteen thousand, one hundred ninety-three".