1149197243 has 2 divisors, whose sum is σ = 1149197244. Its totient is φ = 1149197242.

The previous prime is 1149197209. The next prime is 1149197293. The reversal of 1149197243 is 3427919411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1149197243 - 2⁸ = 1149196987 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1149197243.

It is not a weakly prime, because it can be changed into another prime (1149197293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 574598621 + 574598622.

It is an arithmetic number, because the mean of its divisors is an integer number (574598622).

Almost surely, 2^1149197243 is an apocalyptic number.

1149197243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1149197243 is an equidigital number, since it uses as much as digits as its factorization.

1149197243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 1149197243 is about 33899.8118431356. The cubic root of 1149197243 is about 1047.4457166805.

The spelling of 1149197243 in words is "one billion, one hundred forty-nine million, one hundred ninety-seven thousand, two hundred forty-three".