2749849 has 2 divisors, whose sum is σ = 2749850. Its totient is φ = 2749848.

The previous prime is 2749847. The next prime is 2749883. The reversal of 2749849 is 9489472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2250000 + 499849 = 1500^2 + 707^2 .

It is a cyclic number.

It is not a de Polignac number, because 2749849 - 2¹ = 2749847 is a prime.

Together with 2749847, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2²¹ + 7 + 4⁷ + 9⁴ + 8⁵ + 4⁸ + 9⁶ .

It is not a weakly prime, because it can be changed into another prime (2749847) 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, 1374924 + 1374925.

It is an arithmetic number, because the mean of its divisors is an integer number (1374925).

2^2749849 is an apocalyptic number.

It is an amenable number.

2749849 is a deficient number, since it is larger than the sum of its proper divisors (1).

2749849 is an equidigital number, since it uses as much as digits as its factorization.

2749849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 2749849 is about 1658.2668663397. The cubic root of 2749849 is about 140.0994021953.

The spelling of 2749849 in words is "two million, seven hundred forty-nine thousand, eight hundred forty-nine".