1143230749 has 2 divisors, whose sum is σ = 1143230750. Its totient is φ = 1143230748.

The previous prime is 1143230701. The next prime is 1143230791. The reversal of 1143230749 is 9470323411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655616025 + 487614724 = 25605^2 + 22082^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1143230749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1143230149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571615374 + 571615375.

It is an arithmetic number, because the mean of its divisors is an integer number (571615375).

Almost surely, 2^1143230749 is an apocalyptic number.

It is an amenable number.

1143230749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143230749 is an equidigital number, since it uses as much as digits as its factorization.

1143230749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1143230749 is about 33811.6954469899. The cubic root of 1143230749 is about 1045.6298329947.

The spelling of 1143230749 in words is "one billion, one hundred forty-three million, two hundred thirty thousand, seven hundred forty-nine".