11001009 has 4 divisors (see below), whose sum is σ = 14668016. Its totient is φ = 7334004.

The previous prime is 11001007. The next prime is 11001013. The reversal of 11001009 is 90010011.

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 11001009 - 2¹ = 11001007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11000985 and 11001003.

It is not an unprimeable number, because it can be changed into a prime (11001007) 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, 1833499 + ... + 1833504.

It is an arithmetic number, because the mean of its divisors is an integer number (3667004).

Almost surely, 2^11001009 is an apocalyptic number.

It is an amenable number.

11001009 is a deficient number, since it is larger than the sum of its proper divisors (3667007).

11001009 is an equidigital number, since it uses as much as digits as its factorization.

11001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3667006.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 11001009 is about 3316.7768993407. The cubic root of 11001009 is about 222.4048088366.

The spelling of 11001009 in words is "eleven million, one thousand, nine".