3989369 has 4 divisors (see below), whose sum is σ = 3993444. Its totient is φ = 3985296.

The previous prime is 3989351. The next prime is 3989371. The reversal of 3989369 is 9639893.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9639893 = 67 ⋅143879.

It can be written as a sum of positive squares in 2 ways, for example, as 1857769 + 2131600 = 1363^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 3989369 - 2²⁰ = 2940793 is a prime.

It is a super-2 number, since 2×3989369² = 31830130036322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3989329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419 + ... + 2855.

It is an arithmetic number, because the mean of its divisors is an integer number (998361).

Almost surely, 2^3989369 is an apocalyptic number.

It is an amenable number.

3989369 is a deficient number, since it is larger than the sum of its proper divisors (4075).

3989369 is a wasteful number, since it uses less digits than its factorization.

3989369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074.

The product of its digits is 314928, while the sum is 47.

The square root of 3989369 is about 1997.3404817407. The cubic root of 3989369 is about 158.5993499208.

The spelling of 3989369 in words is "three million, nine hundred eighty-nine thousand, three hundred sixty-nine".