4891128433 has 2 divisors, whose sum is σ = 4891128434. Its totient is φ = 4891128432.

The previous prime is 4891128427. The next prime is 4891128491. The reversal of 4891128433 is 3348211984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4603215409 + 287913024 = 67847^2 + 16968^2 .

It is a cyclic number.

It is not a de Polignac number, because 4891128433 - 2⁹ = 4891127921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4891128433.

It is not a weakly prime, because it can be changed into another prime (4891128493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445564216 + 2445564217.

It is an arithmetic number, because the mean of its divisors is an integer number (2445564217).

Almost surely, 2^4891128433 is an apocalyptic number.

It is an amenable number.

4891128433 is a deficient number, since it is larger than the sum of its proper divisors (1).

4891128433 is an equidigital number, since it uses as much as digits as its factorization.

4891128433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 43.

The square root of 4891128433 is about 69936.6029558199. The cubic root of 4891128433 is about 1697.4735751709.

The spelling of 4891128433 in words is "four billion, eight hundred ninety-one million, one hundred twenty-eight thousand, four hundred thirty-three".