1133243491 has 2 divisors, whose sum is σ = 1133243492. Its totient is φ = 1133243490.

The previous prime is 1133243413. The next prime is 1133243521. The reversal of 1133243491 is 1943423311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1133243491 - 2¹¹ = 1133241443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1133243591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 566621745 + 566621746.

It is an arithmetic number, because the mean of its divisors is an integer number (566621746).

Almost surely, 2^1133243491 is an apocalyptic number.

1133243491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1133243491 is an equidigital number, since it uses as much as digits as its factorization.

1133243491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 1133243491 is about 33663.6820772773. The cubic root of 1133243491 is about 1042.5760507484.

The spelling of 1133243491 in words is "one billion, one hundred thirty-three million, two hundred forty-three thousand, four hundred ninety-one".