2821782973 has 2 divisors, whose sum is σ = 2821782974. Its totient is φ = 2821782972.

The previous prime is 2821782959. The next prime is 2821782979. The reversal of 2821782973 is 3792871282.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2504301849 + 317481124 = 50043^2 + 17818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2821782973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2821782979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410891486 + 1410891487.

It is an arithmetic number, because the mean of its divisors is an integer number (1410891487).

Almost surely, 2^2821782973 is an apocalyptic number.

It is an amenable number.

2821782973 is a deficient number, since it is larger than the sum of its proper divisors (1).

2821782973 is an equidigital number, since it uses as much as digits as its factorization.

2821782973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 49.

The square root of 2821782973 is about 53120.4571987102. The cubic root of 2821782973 is about 1413.1053355306.

The spelling of 2821782973 in words is "two billion, eight hundred twenty-one million, seven hundred eighty-two thousand, nine hundred seventy-three".