1123231139 has 2 divisors, whose sum is σ = 1123231140. Its totient is φ = 1123231138.

The previous prime is 1123231129. The next prime is 1123231141. The reversal of 1123231139 is 9311323211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123231139 - 2⁸ = 1123230883 is a prime.

Together with 1123231141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1123231129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561615569 + 561615570.

It is an arithmetic number, because the mean of its divisors is an integer number (561615570).

Almost surely, 2^1123231139 is an apocalyptic number.

1123231139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123231139 is an equidigital number, since it uses as much as digits as its factorization.

1123231139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 26.

The square root of 1123231139 is about 33514.6406664311. The cubic root of 1123231139 is about 1039.4965323814.

The spelling of 1123231139 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, one hundred thirty-nine".