4403989 has 2 divisors, whose sum is σ = 4403990. Its totient is φ = 4403988.

The previous prime is 4403983. The next prime is 4404019. The reversal of 4403989 is 9893044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3301489 + 1102500 = 1817^2 + 1050^2 .

It is a cyclic number.

It is not a de Polignac number, because 4403989 - 2³ = 4403981 is a prime.

It is a super-2 number, since 2×4403989² = 38790238224242, which contains 22 as substring.

4403989 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4403981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2201994 + 2201995.

It is an arithmetic number, because the mean of its divisors is an integer number (2201995).

Almost surely, 2^4403989 is an apocalyptic number.

It is an amenable number.

4403989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4403989 is an equidigital number, since it uses as much as digits as its factorization.

4403989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 4403989 is about 2098.5683214992. The cubic root of 4403989 is about 163.9137584441.

The spelling of 4403989 in words is "four million, four hundred three thousand, nine hundred eighty-nine".