1009091011 has 4 divisors (see below), whose sum is σ = 1009650024. Its totient is φ = 1008532000.

The previous prime is 1009091003. The next prime is 1009091021. The reversal of 1009091011 is 1101909001.

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 1009091011 - 2³ = 1009091003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1009091021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276790 + ... + 280411.

It is an arithmetic number, because the mean of its divisors is an integer number (252412506).

Almost surely, 2^1009091011 is an apocalyptic number.

1009091011 is a deficient number, since it is larger than the sum of its proper divisors (559013).

1009091011 is an equidigital number, since it uses as much as digits as its factorization.

1009091011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559012.

The product of its (nonzero) digits is 81, while the sum is 22.

The square root of 1009091011 is about 31766.1928943334. The cubic root of 1009091011 is about 1003.0212001575.

It can be divided in two parts, 10090 and 91011, that added together give a palindrome (101101).

The spelling of 1009091011 in words is "one billion, nine million, ninety-one thousand, eleven".