1115305987 has 2 divisors, whose sum is σ = 1115305988. Its totient is φ = 1115305986.

The previous prime is 1115305981. The next prime is 1115305991. The reversal of 1115305987 is 7895035111.

It is a strong prime.

It is an emirp because it is prime and its reverse (7895035111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1115305987 - 2³ = 1115305979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115305981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557652993 + 557652994.

It is an arithmetic number, because the mean of its divisors is an integer number (557652994).

Almost surely, 2^1115305987 is an apocalyptic number.

1115305987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115305987 is an equidigital number, since it uses as much as digits as its factorization.

1115305987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 40.

The square root of 1115305987 is about 33396.1971936926. The cubic root of 1115305987 is about 1037.0459772176.

The spelling of 1115305987 in words is "one billion, one hundred fifteen million, three hundred five thousand, nine hundred eighty-seven".