4681609 has 2 divisors, whose sum is σ = 4681610. Its totient is φ = 4681608.

The previous prime is 4681603. The next prime is 4681631. The reversal of 4681609 is 9061864.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3504384 + 1177225 = 1872^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 4681609 - 2⁹ = 4681097 is a prime.

4681609 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4681603) 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, 2340804 + 2340805.

It is an arithmetic number, because the mean of its divisors is an integer number (2340805).

Almost surely, 2^4681609 is an apocalyptic number.

It is an amenable number.

4681609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4681609 is an equidigital number, since it uses as much as digits as its factorization.

4681609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 4681609 is about 2163.7026135770. The cubic root of 4681609 is about 167.2880991612.

The spelling of 4681609 in words is "four million, six hundred eighty-one thousand, six hundred nine".