2002643 has 2 divisors, whose sum is σ = 2002644. Its totient is φ = 2002642.

The previous prime is 2002621. The next prime is 2002661. The reversal of 2002643 is 3462002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2002643 - 2⁶ = 2002579 is a prime.

It is not a weakly prime, because it can be changed into another prime (2002603) 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, 1001321 + 1001322.

It is an arithmetic number, because the mean of its divisors is an integer number (1001322).

2^2002643 is an apocalyptic number.

2002643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002643 is an equidigital number, since it uses as much as digits as its factorization.

2002643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 2002643 is about 1415.1476954721. The cubic root of 2002643 is about 126.0475800821.

Adding to 2002643 its reverse (3462002), we get a palindrome (5464645).

The spelling of 2002643 in words is "two million, two thousand, six hundred forty-three".