1178471887 has 2 divisors, whose sum is σ = 1178471888. Its totient is φ = 1178471886.

The previous prime is 1178471881. The next prime is 1178471929. The reversal of 1178471887 is 7881748711.

It is a weak prime.

It is an emirp because it is prime and its reverse (7881748711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1178471887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1178471881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 589235943 + 589235944.

It is an arithmetic number, because the mean of its divisors is an integer number (589235944).

Almost surely, 2^1178471887 is an apocalyptic number.

1178471887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1178471887 is an equidigital number, since it uses as much as digits as its factorization.

1178471887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 702464, while the sum is 52.

The square root of 1178471887 is about 34328.8783242331. The cubic root of 1178471887 is about 1056.2654527483.

The spelling of 1178471887 in words is "one billion, one hundred seventy-eight million, four hundred seventy-one thousand, eight hundred eighty-seven".