2091149 has 2 divisors, whose sum is σ = 2091150. Its totient is φ = 2091148.

The previous prime is 2091139. The next prime is 2091151. The reversal of 2091149 is 9411902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1737124 + 354025 = 1318^2 + 595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2091149 is a prime.

Together with 2091151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2091139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1045574 + 1045575.

It is an arithmetic number, because the mean of its divisors is an integer number (1045575).

2^2091149 is an apocalyptic number.

It is an amenable number.

2091149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2091149 is an equidigital number, since it uses as much as digits as its factorization.

2091149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 2091149 is about 1446.0805648372. The cubic root of 2091149 is about 127.8777519349.

The spelling of 2091149 in words is "two million, ninety-one thousand, one hundred forty-nine".