3128197889 has 2 divisors, whose sum is σ = 3128197890. Its totient is φ = 3128197888.

The previous prime is 3128197883. The next prime is 3128197901. The reversal of 3128197889 is 9887918213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2845689025 + 282508864 = 53345^2 + 16808^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3128197889 is a prime.

It is not a weakly prime, because it can be changed into another prime (3128197883) 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, 1564098944 + 1564098945.

It is an arithmetic number, because the mean of its divisors is an integer number (1564098945).

Almost surely, 2^3128197889 is an apocalyptic number.

It is an amenable number.

3128197889 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128197889 is an equidigital number, since it uses as much as digits as its factorization.

3128197889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 56.

The square root of 3128197889 is about 55930.2949125069. The cubic root of 3128197889 is about 1462.5074022466.

The spelling of 3128197889 in words is "three billion, one hundred twenty-eight million, one hundred ninety-seven thousand, eight hundred eighty-nine".