4089569 has 4 divisors (see below), whose sum is σ = 4461360. Its totient is φ = 3717780.

The previous prime is 4089563. The next prime is 4089581. The reversal of 4089569 is 9659804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-4089569 is a prime.

It is a super-2 number, since 2×4089569² = 33449149211522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4089563) 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, 185879 + ... + 185900.

It is an arithmetic number, because the mean of its divisors is an integer number (1115340).

Almost surely, 2^4089569 is an apocalyptic number.

It is an amenable number.

4089569 is a deficient number, since it is larger than the sum of its proper divisors (371791).

4089569 is a wasteful number, since it uses less digits than its factorization.

4089569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371790.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 4089569 is about 2022.2682809163. The cubic root of 4089569 is about 159.9162191583.

The spelling of 4089569 in words is "four million, eighty-nine thousand, five hundred sixty-nine".