2805091 has 2 divisors, whose sum is σ = 2805092. Its totient is φ = 2805090.

The previous prime is 2805071. The next prime is 2805107. The reversal of 2805091 is 1905082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2805091 - 2²¹ = 707939 is a prime.

It is not a weakly prime, because it can be changed into another prime (2805001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402545 + 1402546.

It is an arithmetic number, because the mean of its divisors is an integer number (1402546).

2^2805091 is an apocalyptic number.

2805091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805091 is an equidigital number, since it uses as much as digits as its factorization.

2805091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2805091 is about 1674.8405894293. The cubic root of 2805091 is about 141.0313462491.

Subtracting from 2805091 its reverse (1905082), we obtain a palindrome (900009).

The spelling of 2805091 in words is "two million, eight hundred five thousand, ninety-one".