1428895978793 has 2 divisors, whose sum is σ = 1428895978794. Its totient is φ = 1428895978792.

The previous prime is 1428895978723. The next prime is 1428895978819. The reversal of 1428895978793 is 3978795988241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 813970253209 + 614925725584 = 902203^2 + 784172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1428895978793 - 2¹⁶ = 1428895913257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1428895978723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714447989396 + 714447989397.

It is an arithmetic number, because the mean of its divisors is an integer number (714447989397).

Almost surely, 2^{1428895978793} is an apocalyptic number.

It is an amenable number.

1428895978793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428895978793 is an equidigital number, since it uses as much as digits as its factorization.

1428895978793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2194698240, while the sum is 80.

The spelling of 1428895978793 in words is "one trillion, four hundred twenty-eight billion, eight hundred ninety-five million, nine hundred seventy-eight thousand, seven hundred ninety-three".