9091091 has 4 divisors (see below), whose sum is σ = 9384384. Its totient is φ = 8797800.

The previous prime is 9091079. The next prime is 9091099. The reversal of 9091091 is 1901909.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-9091091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9091099) 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, 146600 + ... + 146661.

It is an arithmetic number, because the mean of its divisors is an integer number (2346096).

Almost surely, 2^9091091 is an apocalyptic number.

9091091 is a deficient number, since it is larger than the sum of its proper divisors (293293).

9091091 is a wasteful number, since it uses less digits than its factorization.

9091091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293292.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 9091091 is about 3015.1436118368. The cubic root of 9091091 is about 208.7077943047.

The spelling of 9091091 in words is "nine million, ninety-one thousand, ninety-one".