1131311239 has 2 divisors, whose sum is σ = 1131311240. Its totient is φ = 1131311238.

The previous prime is 1131311213. The next prime is 1131311249. The reversal of 1131311239 is 9321131311.

It is a strong prime.

It is an emirp because it is prime and its reverse (9321131311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131311239 - 2¹⁵ = 1131278471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131311249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565655619 + 565655620.

It is an arithmetic number, because the mean of its divisors is an integer number (565655620).

Almost surely, 2^1131311239 is an apocalyptic number.

1131311239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131311239 is an equidigital number, since it uses as much as digits as its factorization.

1131311239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 25.

The square root of 1131311239 is about 33634.9704771686. The cubic root of 1131311239 is about 1041.9831608937.

The spelling of 1131311239 in words is "one billion, one hundred thirty-one million, three hundred eleven thousand, two hundred thirty-nine".