1116775987 has 2 divisors, whose sum is σ = 1116775988. Its totient is φ = 1116775986.

The previous prime is 1116775967. The next prime is 1116776027. The reversal of 1116775987 is 7895776111.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7895776111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1116775987 - 2⁷ = 1116775859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1116775967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558387993 + 558387994.

It is an arithmetic number, because the mean of its divisors is an integer number (558387994).

Almost surely, 2^1116775987 is an apocalyptic number.

1116775987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116775987 is an equidigital number, since it uses as much as digits as its factorization.

1116775987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740880, while the sum is 52.

The square root of 1116775987 is about 33418.1984403708. The cubic root of 1116775987 is about 1037.5013943369.

The spelling of 1116775987 in words is "one billion, one hundred sixteen million, seven hundred seventy-five thousand, nine hundred eighty-seven".