2209985749 has 2 divisors, whose sum is σ = 2209985750. Its totient is φ = 2209985748.

The previous prime is 2209985719. The next prime is 2209985783. The reversal of 2209985749 is 9475899022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2054808900 + 155176849 = 45330^2 + 12457^2 .

It is a cyclic number.

It is not a de Polignac number, because 2209985749 - 2⁹ = 2209985237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2209985749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2209985719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104992874 + 1104992875.

It is an arithmetic number, because the mean of its divisors is an integer number (1104992875).

Almost surely, 2^2209985749 is an apocalyptic number.

It is an amenable number.

2209985749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209985749 is an equidigital number, since it uses as much as digits as its factorization.

2209985749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 2209985749 is about 47010.4855218493. The cubic root of 2209985749 is about 1302.5562619022.

The spelling of 2209985749 in words is "two billion, two hundred nine million, nine hundred eighty-five thousand, seven hundred forty-nine".