2579961889 has 2 divisors, whose sum is σ = 2579961890. Its totient is φ = 2579961888.

The previous prime is 2579961833. The next prime is 2579961907. The reversal of 2579961889 is 9881699752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2561169664 + 18792225 = 50608^2 + 4335^2 .

It is a cyclic number.

It is not a de Polignac number, because 2579961889 - 2²³ = 2571573281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2579961889.

It is not a weakly prime, because it can be changed into another prime (2579961809) 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, 1289980944 + 1289980945.

It is an arithmetic number, because the mean of its divisors is an integer number (1289980945).

Almost surely, 2^2579961889 is an apocalyptic number.

It is an amenable number.

2579961889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2579961889 is an equidigital number, since it uses as much as digits as its factorization.

2579961889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19595520, while the sum is 64.

The square root of 2579961889 is about 50793.3252406259. The cubic root of 2579961889 is about 1371.5272167423.

The spelling of 2579961889 in words is "two billion, five hundred seventy-nine million, nine hundred sixty-one thousand, eight hundred eighty-nine".