1123272287 has 2 divisors, whose sum is σ = 1123272288. Its totient is φ = 1123272286.

The previous prime is 1123272281. The next prime is 1123272289. The reversal of 1123272287 is 7822723211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123272287 - 2²² = 1119077983 is a prime.

Together with 1123272289, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123272281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561636143 + 561636144.

It is an arithmetic number, because the mean of its divisors is an integer number (561636144).

Almost surely, 2^1123272287 is an apocalyptic number.

1123272287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123272287 is an equidigital number, since it uses as much as digits as its factorization.

1123272287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 35.

The square root of 1123272287 is about 33515.2545417755. The cubic root of 1123272287 is about 1039.5092257264.

Adding to 1123272287 its reverse (7822723211), we get a palindrome (8945995498).

The spelling of 1123272287 in words is "one billion, one hundred twenty-three million, two hundred seventy-two thousand, two hundred eighty-seven".