11011001 has 8 divisors (see below), whose sum is σ = 11332608. Its totient is φ = 10692000.

The previous prime is 11010971. The next prime is 11011003. The reversal of 11011001 is 10011011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10616 + ... + 11606.

It is an arithmetic number, because the mean of its divisors is an integer number (1416576).

Almost surely, 2^11011001 is an apocalyptic number.

It is an amenable number.

11011001 is a deficient number, since it is larger than the sum of its proper divisors (321607).

11011001 is an equidigital number, since it uses as much as digits as its factorization.

11011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303.

The product of its (nonzero) digits is 1, while the sum is 5.

The square root of 11011001 is about 3318.2828390600. The cubic root of 11011001 is about 222.4721237643.

Adding to 11011001 its reverse (10011011), we get a palindrome (21022012).

Multiplying 11011001 by its reverse (10011011), we get a palindrome (110231252132011).

It can be divided in two parts, 110 and 11001, that added together give a palindrome (11111).

The spelling of 11011001 in words is "eleven million, eleven thousand, one".