2195749 has 2 divisors, whose sum is σ = 2195750. Its totient is φ = 2195748.

The previous prime is 2195731. The next prime is 2195759. The reversal of 2195749 is 9475912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2122849 + 72900 = 1457^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 2195749 - 2⁵ = 2195717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2195729) 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, 1097874 + 1097875.

It is an arithmetic number, because the mean of its divisors is an integer number (1097875).

2^2195749 is an apocalyptic number.

It is an amenable number.

2195749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2195749 is an equidigital number, since it uses as much as digits as its factorization.

2195749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 2195749 is about 1481.8059926994. The cubic root of 2195749 is about 129.9753207590.

The spelling of 2195749 in words is "two million, one hundred ninety-five thousand, seven hundred forty-nine".