3984569 has 4 divisors (see below), whose sum is σ = 3988596. Its totient is φ = 3980544.

The previous prime is 3984521. The next prime is 3984587. The reversal of 3984569 is 9654893.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 1658944 + 2325625 = 1288^2 + 1525^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984569 - 2¹⁶ = 3919033 is a prime.

It is a super-2 number, since 2×3984569² = 31753580231522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3984599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617 + ... + 2889.

It is an arithmetic number, because the mean of its divisors is an integer number (997149).

Almost surely, 2^3984569 is an apocalyptic number.

It is an amenable number.

3984569 is a deficient number, since it is larger than the sum of its proper divisors (4027).

3984569 is a wasteful number, since it uses less digits than its factorization.

3984569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026.

The product of its digits is 233280, while the sum is 44.

The square root of 3984569 is about 1996.1385222474. The cubic root of 3984569 is about 158.5357155961.

The spelling of 3984569 in words is "three million, nine hundred eighty-four thousand, five hundred sixty-nine".