1131223727 has 2 divisors, whose sum is σ = 1131223728. Its totient is φ = 1131223726.

The previous prime is 1131223721. The next prime is 1131223763. The reversal of 1131223727 is 7273221311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131223727 - 2⁶ = 1131223663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131223727.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131223721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565611863 + 565611864.

It is an arithmetic number, because the mean of its divisors is an integer number (565611864).

Almost surely, 2^1131223727 is an apocalyptic number.

1131223727 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131223727 is an equidigital number, since it uses as much as digits as its factorization.

1131223727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3528, while the sum is 29.

The square root of 1131223727 is about 33633.6695440744. The cubic root of 1131223727 is about 1041.9562928434.

The spelling of 1131223727 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, seven hundred twenty-seven".