2820943 has 2 divisors, whose sum is σ = 2820944. Its totient is φ = 2820942.

The previous prime is 2820941. The next prime is 2820947. The reversal of 2820943 is 3490282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2820943 - 2¹ = 2820941 is a prime.

Together with 2820941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2820941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1410471 + 1410472.

It is an arithmetic number, because the mean of its divisors is an integer number (1410472).

2^2820943 is an apocalyptic number.

2820943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2820943 is an equidigital number, since it uses as much as digits as its factorization.

2820943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 2820943 is about 1679.5663130701. The cubic root of 2820943 is about 141.2965106447.

The spelling of 2820943 in words is "two million, eight hundred twenty thousand, nine hundred forty-three".