1131123239 has 2 divisors, whose sum is σ = 1131123240. Its totient is φ = 1131123238.

The previous prime is 1131123229. The next prime is 1131123251. The reversal of 1131123239 is 9323211311.

It is a weak prime.

It is an emirp because it is prime and its reverse (9323211311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131123239 is a prime.

It is a super-2 number, since 2×1131123239² = 2558879563611702242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131123229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565561619 + 565561620.

It is an arithmetic number, because the mean of its divisors is an integer number (565561620).

Almost surely, 2^1131123239 is an apocalyptic number.

1131123239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131123239 is an equidigital number, since it uses as much as digits as its factorization.

1131123239 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 1131123239 is about 33632.1756507069. The cubic root of 1131123239 is about 1041.9254391752.

The spelling of 1131123239 in words is "one billion, one hundred thirty-one million, one hundred twenty-three thousand, two hundred thirty-nine".