2290091 has 2 divisors, whose sum is σ = 2290092. Its totient is φ = 2290090.

The previous prime is 2290081. The next prime is 2290097. The reversal of 2290091 is 1900922.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2290091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2290097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145045 + 1145046.

It is an arithmetic number, because the mean of its divisors is an integer number (1145046).

2^2290091 is an apocalyptic number.

2290091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2290091 is an equidigital number, since it uses as much as digits as its factorization.

2290091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2290091 is about 1513.3046619898. The cubic root of 2290091 is about 131.8107749378.

The spelling of 2290091 in words is "two million, two hundred ninety thousand, ninety-one".