2820938389 has 2 divisors, whose sum is σ = 2820938390. Its totient is φ = 2820938388.

The previous prime is 2820938377. The next prime is 2820938413. The reversal of 2820938389 is 9838390282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2517028900 + 303909489 = 50170^2 + 17433^2 .

It is a cyclic number.

It is not a de Polignac number, because 2820938389 - 2¹⁹ = 2820414101 is a prime.

It is a super-3 number, since 3×2820938389³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2820938089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410469194 + 1410469195.

It is an arithmetic number, because the mean of its divisors is an integer number (1410469195).

Almost surely, 2^2820938389 is an apocalyptic number.

It is an amenable number.

2820938389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820938389 is an equidigital number, since it uses as much as digits as its factorization.

2820938389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The square root of 2820938389 is about 53112.5068980932. The cubic root of 2820938389 is about 1412.9643365875.

The spelling of 2820938389 in words is "two billion, eight hundred twenty million, nine hundred thirty-eight thousand, three hundred eighty-nine".