128446393 has 2 divisors, whose sum is σ = 128446394. Its totient is φ = 128446392.

The previous prime is 128446291. The next prime is 128446397. The reversal of 128446393 is 393644821.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79067664 + 49378729 = 8892^2 + 7027^2 .

It is a cyclic number.

It is not a de Polignac number, because 128446393 - 2⁹ = 128445881 is a prime.

It is not a weakly prime, because it can be changed into another prime (128446397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64223196 + 64223197.

It is an arithmetic number, because the mean of its divisors is an integer number (64223197).

Almost surely, 2^128446393 is an apocalyptic number.

It is an amenable number.

128446393 is a deficient number, since it is larger than the sum of its proper divisors (1).

128446393 is an equidigital number, since it uses as much as digits as its factorization.

128446393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 40.

The square root of 128446393 is about 11333.4192986936. The cubic root of 128446393 is about 504.5535943310.

The spelling of 128446393 in words is "one hundred twenty-eight million, four hundred forty-six thousand, three hundred ninety-three".