2108549 has 2 divisors, whose sum is σ = 2108550. Its totient is φ = 2108548.

The previous prime is 2108543. The next prime is 2108551. The reversal of 2108549 is 9458012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1940449 + 168100 = 1393^2 + 410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2108549 is a prime.

Together with 2108551, 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 (2108543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054274 + 1054275.

It is an arithmetic number, because the mean of its divisors is an integer number (1054275).

2^2108549 is an apocalyptic number.

It is an amenable number.

2108549 is a deficient number, since it is larger than the sum of its proper divisors (1).

2108549 is an equidigital number, since it uses as much as digits as its factorization.

2108549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2108549 is about 1452.0843639403. The cubic root of 2108549 is about 128.2314537840.

The spelling of 2108549 in words is "two million, one hundred eight thousand, five hundred forty-nine".