128455783 has 2 divisors, whose sum is σ = 128455784. Its totient is φ = 128455782.

The previous prime is 128455777. The next prime is 128455793. The reversal of 128455783 is 387554821.

It is a weak prime.

It is an emirp because it is prime and its reverse (387554821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128455783 - 2²⁵ = 94901351 is a prime.

It is a super-2 number, since 2×128455783² = 33001776372286178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128455753) 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, 64227891 + 64227892.

It is an arithmetic number, because the mean of its divisors is an integer number (64227892).

Almost surely, 2^128455783 is an apocalyptic number.

128455783 is a deficient number, since it is larger than the sum of its proper divisors (1).

128455783 is an equidigital number, since it uses as much as digits as its factorization.

128455783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 268800, while the sum is 43.

The square root of 128455783 is about 11333.8335526864. The cubic root of 128455783 is about 504.5658890652.

The spelling of 128455783 in words is "one hundred twenty-eight million, four hundred fifty-five thousand, seven hundred eighty-three".