909091011 has 4 divisors (see below), whose sum is σ = 1212121352. Its totient is φ = 606060672.

The previous prime is 909090977. The next prime is 909091013. The reversal of 909091011 is 110190909.

909091011 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, and also an emirpimes, since its reverse is a distinct semiprime: 110190909 = 3 ⋅36730303.

It is not a de Polignac number, because 909091011 - 2⁶ = 909090947 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 909091011.

It is not an unprimeable number, because it can be changed into a prime (909091013) 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, 151515166 + ... + 151515171.

It is an arithmetic number, because the mean of its divisors is an integer number (303030338).

Almost surely, 2^909091011 is an apocalyptic number.

909091011 is a deficient number, since it is larger than the sum of its proper divisors (303030341).

909091011 is a wasteful number, since it uses less digits than its factorization.

909091011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303030340.

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 909091011 is about 30151.1361477474. The cubic root of 909091011 is about 968.7293423496.

The spelling of 909091011 in words is "nine hundred nine million, ninety-one thousand, eleven".