3989549 has 4 divisors (see below), whose sum is σ = 3999900. Its totient is φ = 3979200.

The previous prime is 3989533. The next prime is 3989569. The reversal of 3989549 is 9459893.

3989549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3087049 + 902500 = 1757^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 3989549 - 2⁴ = 3989533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4574 + ... + 5375.

It is an arithmetic number, because the mean of its divisors is an integer number (999975).

Almost surely, 2^3989549 is an apocalyptic number.

It is an amenable number.

3989549 is a deficient number, since it is larger than the sum of its proper divisors (10351).

3989549 is an equidigital number, since it uses as much as digits as its factorization.

3989549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10350.

The product of its digits is 349920, while the sum is 47.

The square root of 3989549 is about 1997.3855411512. The cubic root of 3989549 is about 158.6017352148.

The spelling of 3989549 in words is "three million, nine hundred eighty-nine thousand, five hundred forty-nine".