2820329789 has 4 divisors (see below), whose sum is σ = 2823613920. Its totient is φ = 2817045660.

The previous prime is 2820329753. The next prime is 2820329857. The reversal of 2820329789 is 9879230282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9879230282 = 2 ⋅4939615141.

It is a cyclic number.

It is not a de Polignac number, because 2820329789 - 2²⁴ = 2803552573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2820329719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1640777 + ... + 1642494.

It is an arithmetic number, because the mean of its divisors is an integer number (705903480).

Almost surely, 2^2820329789 is an apocalyptic number.

It is an amenable number.

2820329789 is a deficient number, since it is larger than the sum of its proper divisors (3284131).

2820329789 is an equidigital number, since it uses as much as digits as its factorization.

2820329789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284130.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 2820329789 is about 53106.7772417043. Note that the first 3 decimals coincide. The cubic root of 2820329789 is about 1412.8627165087.

The spelling of 2820329789 in words is "two billion, eight hundred twenty million, three hundred twenty-nine thousand, seven hundred eighty-nine".