3989189 has 6 divisors (see below), whose sum is σ = 4170726. Its totient is φ = 3815240.

The previous prime is 3989171. The next prime is 3989191. The reversal of 3989189 is 9819893.

3989189 is an esthetic number in base 13, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 2666689 + 1322500 = 1633^2 + 1150^2 .

It is not a de Polignac number, because 3989189 - 2¹⁶ = 3923653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3242 + ... + 4299.

It is an arithmetic number, because the mean of its divisors is an integer number (695121).

Almost surely, 2^3989189 is an apocalyptic number.

It is an amenable number.

3989189 is a deficient number, since it is larger than the sum of its proper divisors (181537).

3989189 is an equidigital number, since it uses as much as digits as its factorization.

3989189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7587 (or 7564 counting only the distinct ones).

The product of its digits is 139968, while the sum is 47.

The square root of 3989189 is about 1997.2954213135. The cubic root of 3989189 is about 158.5969645550.

The spelling of 3989189 in words is "three million, nine hundred eighty-nine thousand, one hundred eighty-nine".