9809091 has 12 divisors (see below), whose sum is σ = 14272440. Its totient is φ = 6491520.

The previous prime is 9809089. The next prime is 9809123. The reversal of 9809091 is 1909089.

9809091 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9809091 - 2¹ = 9809089 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

9809091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9809071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2670 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (1189370).

Almost surely, 2^9809091 is an apocalyptic number.

9809091 is a deficient number, since it is larger than the sum of its proper divisors (4463349).

9809091 is a wasteful number, since it uses less digits than its factorization.

9809091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7986 (or 7983 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 9809091 is about 3131.9468386293. The cubic root of 9809091 is about 214.0636474728.

The spelling of 9809091 in words is "nine million, eight hundred nine thousand, ninety-one".