1311155539 has 2 divisors, whose sum is σ = 1311155540. Its totient is φ = 1311155538.

The previous prime is 1311155501. The next prime is 1311155557. The reversal of 1311155539 is 9355511131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311155539 - 2¹⁷ = 1311024467 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311155579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655577769 + 655577770.

It is an arithmetic number, because the mean of its divisors is an integer number (655577770).

Almost surely, 2^1311155539 is an apocalyptic number.

1311155539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311155539 is an equidigital number, since it uses as much as digits as its factorization.

1311155539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10125, while the sum is 34.

The square root of 1311155539 is about 36209.8817866063. The cubic root of 1311155539 is about 1094.5058100946.

The spelling of 1311155539 in words is "one billion, three hundred eleven million, one hundred fifty-five thousand, five hundred thirty-nine".