1183985749 has 2 divisors, whose sum is σ = 1183985750. Its totient is φ = 1183985748.

The previous prime is 1183985701. The next prime is 1183985753. The reversal of 1183985749 is 9475893811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 903423249 + 280562500 = 30057^2 + 16750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1183985749 - 2¹⁷ = 1183854677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1183985749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1183985149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 591992874 + 591992875.

It is an arithmetic number, because the mean of its divisors is an integer number (591992875).

Almost surely, 2^1183985749 is an apocalyptic number.

It is an amenable number.

1183985749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1183985749 is an equidigital number, since it uses as much as digits as its factorization.

1183985749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 55.

The square root of 1183985749 is about 34409.0939869099. The cubic root of 1183985749 is about 1057.9102500569.

The spelling of 1183985749 in words is "one billion, one hundred eighty-three million, nine hundred eighty-five thousand, seven hundred forty-nine".