128443957 has 2 divisors, whose sum is σ = 128443958. Its totient is φ = 128443956.

The previous prime is 128443927. The next prime is 128443961. The reversal of 128443957 is 759344821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125641681 + 2802276 = 11209^2 + 1674^2 .

It is a cyclic number.

It is not a de Polignac number, because 128443957 - 2¹⁵ = 128411189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128443907) 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, 64221978 + 64221979.

It is an arithmetic number, because the mean of its divisors is an integer number (64221979).

Almost surely, 2^128443957 is an apocalyptic number.

It is an amenable number.

128443957 is a deficient number, since it is larger than the sum of its proper divisors (1).

128443957 is an equidigital number, since it uses as much as digits as its factorization.

128443957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 128443957 is about 11333.3118284110. The cubic root of 128443957 is about 504.5504046726.

The spelling of 128443957 in words is "one hundred twenty-eight million, four hundred forty-three thousand, nine hundred fifty-seven".