4643641 has 2 divisors, whose sum is σ = 4643642. Its totient is φ = 4643640.

The previous prime is 4643633. The next prime is 4643659. The reversal of 4643641 is 1463464.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2624400 + 2019241 = 1620^2 + 1421^2 .

It is a cyclic number.

It is not a de Polignac number, because 4643641 - 2³ = 4643633 is a prime.

It is a Chen prime.

4643641 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4643621) 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, 2321820 + 2321821.

It is an arithmetic number, because the mean of its divisors is an integer number (2321821).

Almost surely, 2^4643641 is an apocalyptic number.

It is an amenable number.

4643641 is a deficient number, since it is larger than the sum of its proper divisors (1).

4643641 is an equidigital number, since it uses as much as digits as its factorization.

4643641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 28.

The square root of 4643641 is about 2154.9109030306. The cubic root of 4643641 is about 166.8346337765.

The spelling of 4643641 in words is "four million, six hundred forty-three thousand, six hundred forty-one".