909091000 has 32 divisors (see below), whose sum is σ = 2127275280. Its totient is φ = 363636000.

The previous prime is 909090977. The next prime is 909091013. The reversal of 909091000 is 190909.

909091000 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 909091000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453546 + ... + 455545.

Almost surely, 2^909091000 is an apocalyptic number.

It is an amenable number.

909091000 is an abundant number, since it is smaller than the sum of its proper divisors (1218184280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

909091000 is a wasteful number, since it uses less digits than its factorization.

909091000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909112 (or 909098 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 909091000 is about 30151.1359653330. The cubic root of 909091000 is about 968.7293384424.

The spelling of 909091000 in words is "nine hundred nine million, ninety-one thousand".