4089539 has 4 divisors (see below), whose sum is σ = 4098360. Its totient is φ = 4080720.

The previous prime is 4089521. The next prime is 4089559. The reversal of 4089539 is 9359804.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4089539 - 2¹⁶ = 4024003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4089509) 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, 3674 + ... + 4655.

It is an arithmetic number, because the mean of its divisors is an integer number (1024590).

Almost surely, 2^4089539 is an apocalyptic number.

4089539 is a deficient number, since it is larger than the sum of its proper divisors (8821).

4089539 is an equidigital number, since it uses as much as digits as its factorization.

4089539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8820.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 4089539 is about 2022.2608634892. The cubic root of 4089539 is about 159.9158281229.

The spelling of 4089539 in words is "four million, eighty-nine thousand, five hundred thirty-nine".