1099185749 has 2 divisors, whose sum is σ = 1099185750. Its totient is φ = 1099185748.

The previous prime is 1099185713. The next prime is 1099185799. The reversal of 1099185749 is 9475819901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 778131025 + 321054724 = 27895^2 + 17918^2 .

It is an emirp because it is prime and its reverse (9475819901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1099185749 - 2¹² = 1099181653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1099185749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1099185799) 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, 549592874 + 549592875.

It is an arithmetic number, because the mean of its divisors is an integer number (549592875).

Almost surely, 2^1099185749 is an apocalyptic number.

It is an amenable number.

1099185749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099185749 is an equidigital number, since it uses as much as digits as its factorization.

1099185749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 53.

The square root of 1099185749 is about 33153.9703353912. The cubic root of 1099185749 is about 1032.0253449723.

The spelling of 1099185749 in words is "one billion, ninety-nine million, one hundred eighty-five thousand, seven hundred forty-nine".