128314393 has 2 divisors, whose sum is σ = 128314394. Its totient is φ = 128314392.

The previous prime is 128314331. The next prime is 128314411. The reversal of 128314393 is 393413821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112529664 + 15784729 = 10608^2 + 3973^2 .

It is an emirp because it is prime and its reverse (393413821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128314393 - 2²¹ = 126217241 is a prime.

It is not a weakly prime, because it can be changed into another prime (128324393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64157196 + 64157197.

It is an arithmetic number, because the mean of its divisors is an integer number (64157197).

Almost surely, 2^128314393 is an apocalyptic number.

It is an amenable number.

128314393 is a deficient number, since it is larger than the sum of its proper divisors (1).

128314393 is an equidigital number, since it uses as much as digits as its factorization.

128314393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 128314393 is about 11327.5943165352. The cubic root of 128314393 is about 504.3806975541.

The spelling of 128314393 in words is "one hundred twenty-eight million, three hundred fourteen thousand, three hundred ninety-three".