909090919091 has 8 divisors (see below), whose sum is σ = 911646233664. Its totient is φ = 906536030400.

The previous prime is 909090919067. The next prime is 909090919109. The reversal of 909090919091 is 190919090909.

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

It is a cyclic number.

It is not a de Polignac number, because 909090919091 - 2²² = 909086724787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (909090919001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4440791 + ... + 4640991.

It is an arithmetic number, because the mean of its divisors is an integer number (113955779208).

Almost surely, 2^909090919091 is an apocalyptic number.

909090919091 is a deficient number, since it is larger than the sum of its proper divisors (2555314573).

909090919091 is a wasteful number, since it uses less digits than its factorization.

909090919091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212941.

The product of its (nonzero) digits is 531441, while the sum is 56.

The spelling of 909090919091 in words is "nine hundred nine billion, ninety million, nine hundred nineteen thousand, ninety-one".