2128776589 has 2 divisors, whose sum is σ = 2128776590. Its totient is φ = 2128776588.

The previous prime is 2128776583. The next prime is 2128776673. The reversal of 2128776589 is 9856778212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1906020964 + 222755625 = 43658^2 + 14925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128776589 - 2¹⁷ = 2128645517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128776583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064388294 + 1064388295.

It is an arithmetic number, because the mean of its divisors is an integer number (1064388295).

Almost surely, 2^2128776589 is an apocalyptic number.

It is an amenable number.

2128776589 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128776589 is an equidigital number, since it uses as much as digits as its factorization.

2128776589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 55.

The square root of 2128776589 is about 46138.6669616711. Note that the first 3 decimals coincide. The cubic root of 2128776589 is about 1286.4019660571.

The spelling of 2128776589 in words is "two billion, one hundred twenty-eight million, seven hundred seventy-six thousand, five hundred eighty-nine".