11989011 has 4 divisors (see below), whose sum is σ = 15985352. Its totient is φ = 7992672.

The previous prime is 11988997. The next prime is 11989031. The reversal of 11989011 is 11098911.

It is a happy number.

11989011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11989011 - 2⁵ = 11988979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11989011.

It is not an unprimeable number, because it can be changed into a prime (11989031) 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, 1998166 + ... + 1998171.

It is an arithmetic number, because the mean of its divisors is an integer number (3996338).

Almost surely, 2^11989011 is an apocalyptic number.

11989011 is a deficient number, since it is larger than the sum of its proper divisors (3996341).

11989011 is an equidigital number, since it uses as much as digits as its factorization.

11989011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996340.

The product of its (nonzero) digits is 648, while the sum is 30.

The square root of 11989011 is about 3462.5151263208. The cubic root of 11989011 is about 228.8729423630.

The spelling of 11989011 in words is "eleven million, nine hundred eighty-nine thousand, eleven".