4518643 has 2 divisors, whose sum is σ = 4518644. Its totient is φ = 4518642.

The previous prime is 4518641. The next prime is 4518667. The reversal of 4518643 is 3468154.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4518643 - 2¹ = 4518641 is a prime.

It is a super-2 number, since 2×4518643² = 40836269122898, which contains 22 as substring.

Together with 4518641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4518641) 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, 2259321 + 2259322.

It is an arithmetic number, because the mean of its divisors is an integer number (2259322).

Almost surely, 2^4518643 is an apocalyptic number.

4518643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4518643 is an equidigital number, since it uses as much as digits as its factorization.

4518643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 4518643 is about 2125.7099990356. The cubic root of 4518643 is about 165.3240402808.

The spelling of 4518643 in words is "four million, five hundred eighteen thousand, six hundred forty-three".