2820558989 has 2 divisors, whose sum is σ = 2820558990. Its totient is φ = 2820558988.

The previous prime is 2820558973. The next prime is 2820558997. The reversal of 2820558989 is 9898550282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2434632964 + 385926025 = 49342^2 + 19645^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820558989 - 2⁴ = 2820558973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2820558089) 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, 1410279494 + 1410279495.

It is an arithmetic number, because the mean of its divisors is an integer number (1410279495).

Almost surely, 2^2820558989 is an apocalyptic number.

It is an amenable number.

2820558989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820558989 is an equidigital number, since it uses as much as digits as its factorization.

2820558989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4147200, while the sum is 56.

The square root of 2820558989 is about 53108.9351145360. The cubic root of 2820558989 is about 1412.9009885534.

The spelling of 2820558989 in words is "two billion, eight hundred twenty million, five hundred fifty-eight thousand, nine hundred eighty-nine".