4009559 has 4 divisors (see below), whose sum is σ = 4014480. Its totient is φ = 4004640.

The previous prime is 4009549. The next prime is 4009619. The reversal of 4009559 is 9559004.

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 is a cyclic number.

It is not a de Polignac number, because 4009559 - 2⁴ = 4009543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4009529) 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, 914 + ... + 2975.

It is an arithmetic number, because the mean of its divisors is an integer number (1003620).

Almost surely, 2^4009559 is an apocalyptic number.

4009559 is a deficient number, since it is larger than the sum of its proper divisors (4921).

4009559 is a wasteful number, since it uses less digits than its factorization.

4009559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4920.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 4009559 is about 2002.3883239771. The cubic root of 4009559 is about 158.8664543247.

The spelling of 4009559 in words is "four million, nine thousand, five hundred fifty-nine".