2818643 has 2 divisors, whose sum is σ = 2818644. Its totient is φ = 2818642.

The previous prime is 2818639. The next prime is 2818649. The reversal of 2818643 is 3468182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2818643 - 2² = 2818639 is a prime.

It is a super-2 number, since 2×2818643² = 15889496722898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2818649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1409321 + 1409322.

It is an arithmetic number, because the mean of its divisors is an integer number (1409322).

2^2818643 is an apocalyptic number.

2818643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2818643 is an equidigital number, since it uses as much as digits as its factorization.

2818643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 2818643 is about 1678.8814728860. The cubic root of 2818643 is about 141.2580990996.

The spelling of 2818643 in words is "two million, eight hundred eighteen thousand, six hundred forty-three".