5581009 has 4 divisors (see below), whose sum is σ = 6378304. Its totient is φ = 4783716.

The previous prime is 5581001. The next prime is 5581027. The reversal of 5581009 is 9001855.

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 not a de Polignac number, because 5581009 - 2³ = 5581001 is a prime.

It is a super-2 number, since 2×5581009² = 62295322916162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5581001) 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, 398637 + ... + 398650.

It is an arithmetic number, because the mean of its divisors is an integer number (1594576).

Almost surely, 2^5581009 is an apocalyptic number.

It is an amenable number.

5581009 is a deficient number, since it is larger than the sum of its proper divisors (797295).

5581009 is an equidigital number, since it uses as much as digits as its factorization.

5581009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797294.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 5581009 is about 2362.4159244299. The cubic root of 5581009 is about 177.3798327035.

The spelling of 5581009 in words is "five million, five hundred eighty-one thousand, nine".