1123320287 has 2 divisors, whose sum is σ = 1123320288. Its totient is φ = 1123320286.

The previous prime is 1123320251. The next prime is 1123320329. The reversal of 1123320287 is 7820233211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1123320287 - 2⁸ = 1123320031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123320217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561660143 + 561660144.

It is an arithmetic number, because the mean of its divisors is an integer number (561660144).

Almost surely, 2^1123320287 is an apocalyptic number.

1123320287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123320287 is an equidigital number, since it uses as much as digits as its factorization.

1123320287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1123320287 is about 33515.9706259568. The cubic root of 1123320287 is about 1039.5240323862.

Adding to 1123320287 its reverse (7820233211), we get a palindrome (8943553498).

The spelling of 1123320287 in words is "one billion, one hundred twenty-three million, three hundred twenty thousand, two hundred eighty-seven".