3989561 has 8 divisors (see below), whose sum is σ = 4100544. Its totient is φ = 3880240.

The previous prime is 3989533. The next prime is 3989569. The reversal of 3989561 is 1659893.

3989561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3989561 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 (3989569) 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 7 ways as a sum of consecutive naturals, for example, 5555 + ... + 6231.

It is an arithmetic number, because the mean of its divisors is an integer number (512568).

Almost surely, 2^3989561 is an apocalyptic number.

It is an amenable number.

3989561 is a deficient number, since it is larger than the sum of its proper divisors (110983).

3989561 is an equidigital number, since it uses as much as digits as its factorization.

3989561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831.

The product of its digits is 58320, while the sum is 41.

The square root of 3989561 is about 1997.3885450758. The cubic root of 3989561 is about 158.6018942318.

The spelling of 3989561 in words is "three million, nine hundred eighty-nine thousand, five hundred sixty-one".