1089209011 has 4 divisors (see below), whose sum is σ = 1188228024. Its totient is φ = 990190000.

The previous prime is 1089208979. The next prime is 1089209059. The reversal of 1089209011 is 1109029801.

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

It is a cyclic number.

It is not a de Polignac number, because 1089209011 - 2⁵ = 1089208979 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089209081) 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, 49509490 + ... + 49509511.

It is an arithmetic number, because the mean of its divisors is an integer number (297057006).

Almost surely, 2^1089209011 is an apocalyptic number.

1089209011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1089209011 is a deficient number, since it is larger than the sum of its proper divisors (99019013).

1089209011 is an equidigital number, since it uses as much as digits as its factorization.

1089209011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99019012.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 1089209011 is about 33003.1666813959. The cubic root of 1089209011 is about 1028.8934643206.

The spelling of 1089209011 in words is "one billion, eighty-nine million, two hundred nine thousand, eleven".