9091109 has 2 divisors, whose sum is σ = 9091110. Its totient is φ = 9091108.

The previous prime is 9091099. The next prime is 9091127. The reversal of 9091109 is 9011909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6235009 + 2856100 = 2497^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 9091109 - 2⁸ = 9090853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9091009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545554 + 4545555.

It is an arithmetic number, because the mean of its divisors is an integer number (4545555).

Almost surely, 2^9091109 is an apocalyptic number.

It is an amenable number.

9091109 is a deficient number, since it is larger than the sum of its proper divisors (1).

9091109 is an equidigital number, since it uses as much as digits as its factorization.

9091109 is an evil number, because the sum of its binary digits is even.

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

The square root of 9091109 is about 3015.1465967677. The cubic root of 9091109 is about 208.7079320490.

The spelling of 9091109 in words is "nine million, ninety-one thousand, one hundred nine".