3581009 has 4 divisors (see below), whose sum is σ = 3584880. Its totient is φ = 3577140.

The previous prime is 3581003. The next prime is 3581021. The reversal of 3581009 is 9001853.

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, 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 3581009 - 2¹² = 3576913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3581003) 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, 362 + ... + 2700.

It is an arithmetic number, because the mean of its divisors is an integer number (896220).

Almost surely, 2^3581009 is an apocalyptic number.

It is an amenable number.

3581009 is a deficient number, since it is larger than the sum of its proper divisors (3871).

3581009 is a wasteful number, since it uses less digits than its factorization.

3581009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 3581009 is about 1892.3554105928. The cubic root of 3581009 is about 152.9919115151.

The spelling of 3581009 in words is "three million, five hundred eighty-one thousand, nine".