2578867289 has 2 divisors, whose sum is σ = 2578867290. Its totient is φ = 2578867288.

The previous prime is 2578867267. The next prime is 2578867303. The reversal of 2578867289 is 9827688752.

It is a happy number.

2578867289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2552775625 + 26091664 = 50525^2 + 5108^2 .

It is a cyclic number.

It is not a de Polignac number, because 2578867289 - 2²⁰ = 2577818713 is a prime.

It is not a weakly prime, because it can be changed into another prime (2578867219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289433644 + 1289433645.

It is an arithmetic number, because the mean of its divisors is an integer number (1289433645).

Almost surely, 2^2578867289 is an apocalyptic number.

It is an amenable number.

2578867289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578867289 is an equidigital number, since it uses as much as digits as its factorization.

2578867289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27095040, while the sum is 62.

The square root of 2578867289 is about 50782.5490596918. The cubic root of 2578867289 is about 1371.3332234301. Note that the first 3 decimals are identical.

The spelling of 2578867289 in words is "two billion, five hundred seventy-eight million, eight hundred sixty-seven thousand, two hundred eighty-nine".