4681643 has 4 divisors (see below), whose sum is σ = 4688688. Its totient is φ = 4674600.

The previous prime is 4681639. The next prime is 4681661. The reversal of 4681643 is 3461864.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4681643 - 2² = 4681639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4681603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2408 + ... + 3893.

It is an arithmetic number, because the mean of its divisors is an integer number (1172172).

Almost surely, 2^4681643 is an apocalyptic number.

4681643 is a deficient number, since it is larger than the sum of its proper divisors (7045).

4681643 is an equidigital number, since it uses as much as digits as its factorization.

4681643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044.

The product of its digits is 13824, while the sum is 32.

The square root of 4681643 is about 2163.7104704650. The cubic root of 4681643 is about 167.2885041347.

The spelling of 4681643 in words is "four million, six hundred eighty-one thousand, six hundred forty-three".