4489861 has 2 divisors, whose sum is σ = 4489862. Its totient is φ = 4489860.

The previous prime is 4489847. The next prime is 4489883. The reversal of 4489861 is 1689844.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2825761 + 1664100 = 1681^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 4489861 - 2⁷ = 4489733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4489061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2244930 + 2244931.

It is an arithmetic number, because the mean of its divisors is an integer number (2244931).

Almost surely, 2^4489861 is an apocalyptic number.

It is an amenable number.

4489861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4489861 is an equidigital number, since it uses as much as digits as its factorization.

4489861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 40.

The square root of 4489861 is about 2118.9292107100. The cubic root of 4489861 is about 164.9722757214.

The spelling of 4489861 in words is "four million, four hundred eighty-nine thousand, eight hundred sixty-one".