9090091 has 8 divisors (see below), whose sum is σ = 9283904. Its totient is φ = 8898120.

The previous prime is 9090061. The next prime is 9090127. The reversal of 9090091 is 1900909.

9090091 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9090091 is a prime.

It is a super-3 number, since 3×9090091³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

9090091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9090041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13816 + ... + 14458.

It is an arithmetic number, because the mean of its divisors is an integer number (1160488).

Almost surely, 2^9090091 is an apocalyptic number.

9090091 is a deficient number, since it is larger than the sum of its proper divisors (193813).

9090091 is a wasteful number, since it uses less digits than its factorization.

9090091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921.

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

The square root of 9090091 is about 3014.9777776959. The cubic root of 9090091 is about 208.7001415581.

The spelling of 9090091 in words is "nine million, ninety thousand, ninety-one".