2811091 has 2 divisors, whose sum is σ = 2811092. Its totient is φ = 2811090.

The previous prime is 2811089. The next prime is 2811097. The reversal of 2811091 is 1901182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2811091 - 2¹ = 2811089 is a prime.

It is a super-2 number, since 2×2811091² = 15804465220562, which contains 22 as substring.

Together with 2811089, it forms a pair of twin primes.

It is a Chen prime.

2811091 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2811097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1405545 + 1405546.

It is an arithmetic number, because the mean of its divisors is an integer number (1405546).

2^2811091 is an apocalyptic number.

2811091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2811091 is an equidigital number, since it uses as much as digits as its factorization.

2811091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 2811091 is about 1676.6308478613. The cubic root of 2811091 is about 141.1318284878.

Subtracting from 2811091 its reverse (1901182), we obtain a palindrome (909909).

The spelling of 2811091 in words is "two million, eight hundred eleven thousand, ninety-one".