1311112787 has 2 divisors, whose sum is σ = 1311112788. Its totient is φ = 1311112786.

The previous prime is 1311112771. The next prime is 1311112813. The reversal of 1311112787 is 7872111131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311112787 - 2⁴ = 1311112771 is a prime.

It is a super-3 number, since 3×1311112787³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1311112687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655556393 + 655556394.

It is an arithmetic number, because the mean of its divisors is an integer number (655556394).

Almost surely, 2^1311112787 is an apocalyptic number.

1311112787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311112787 is an equidigital number, since it uses as much as digits as its factorization.

1311112787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 32.

The square root of 1311112787 is about 36209.2914457049. The cubic root of 1311112787 is about 1094.4939140178.

The spelling of 1311112787 in words is "one billion, three hundred eleven million, one hundred twelve thousand, seven hundred eighty-seven".