2081749 has 2 divisors, whose sum is σ = 2081750. Its totient is φ = 2081748.

The previous prime is 2081719. The next prime is 2081777. The reversal of 2081749 is 9471802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2002225 + 79524 = 1415^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081749 - 2⁹ = 2081237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2081749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2081719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1040874 + 1040875.

It is an arithmetic number, because the mean of its divisors is an integer number (1040875).

2^2081749 is an apocalyptic number.

It is an amenable number.

2081749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2081749 is an equidigital number, since it uses as much as digits as its factorization.

2081749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2081749 is about 1442.8267394251. The cubic root of 2081749 is about 127.6858547997.

The spelling of 2081749 in words is "two million, eighty-one thousand, seven hundred forty-nine".